codeinplace2020 · Mbaoma · Apr 24, 2020 · Apr 24, 2020 · Apr 24, 2020 · Apr 24, 2020
diff --git a/examples/Khan Sole Academy/credit.txt b/examples/Khan Sole Academy/credit.txt
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+This solved example was written by Mbaoma Chioma Mary (Section Leader of Section 223)
diff --git a/examples/Khan Sole Academy/index.html b/examples/Khan Sole Academy/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Khan Sole Academy</title>
+</head>
+<body>
+Now that you’ve seen how programming can help us in a number of different areas, it’s
+time for you to implement Khan-sole Academy—a program that helps other people learn!
+In this problem, you’ll write a program in the file <b> khansole_academy.py </b> that randomly
+generates simple addition problems for the user, reads in the answer from the user, and then
+checks to see if they got it right or wrong, until the user appears to have mastered the
+material. Note that “console” is another name for “terminal” :-). <br>
+More specifically, your program should be able to generate simple addition problems that
+involve adding two 2-digit integers (i.e., the numbers 10 through 99). The user should be
+asked for an answer to each problem. Your program should determine if the answer was
+correct or not, and give the user an appropriate message to let them know. Your program
+should keep giving the user problems until the user has gotten 3 problems <b><u>correct in a row.</u></b>
+<br>
+(Note: the number of problems the user needs to get correctly in a row to complete the
+program is just one example of a good place to specify a constant in your program).<br>
+A sample run of the program is shown below (user input is in <b> <i> italics</i></b>.)
+<br>
+<ul>
+<li> What is 51 + 79? <br>
+Your answer: <i> 120 </i> <br>
+    Incorrect. The expected answer is 130  </li> <br> <br>
+
+<li>What is 33 + 19? <br>
+Your answer: <i> 42 </i> <br>
+    Incorrect. The expected answer is 52 </li> <br><br>
+
+<li> What is 55 + 11? <br>
+Your answer: <i> 66 </i> <br>
+    Correct! You've gotten 1 correct in a row.</li> <br><br>
+
+<li> What is 84 + 25? <br>
+Your answer: <i> 109 </i> <br>
+    Correct! You've gotten 2 correct in a row.</li> <br> <br>
+
+<li> What is 26 + 58? <br>
+Your answer: <i> 74 </i> <br>
+    Incorrect. The expected answer is 84 </li> <br> <br>
+
+<li> What is 98 + 85? <br>
+Your answer: <i> 183 </i> <br>
+    Correct! You've gotten 1 correct in a row.</li> <br> <br>
+
+<li> What is 79 + 66? <br>
+Your answer: <i> 145 </i> <br>
+    Correct! You've gotten 2 correct in a row </li> <br> <br>
+
+<li> What is 97 + 20? <br>
+Your answer: <i> 117 </i> <br>
+    Correct! You've gotten 3 correct in a row </li> <br>
+</ul>
+Congratulations! You mastered addition. <br>
+As a side note, one of the earliest programs Mehran wrote (with his friend Matthew) when
+he was first learning how to program was very similar to Khan-Sole Academy and it was
+called “M&M’s Math Puzzles”. It was written in a language named BASIC, on a computer
+that had 4K of memory (that’s 4 Kilobytes) and used cassette tapes (the same kind used for
+music in the 1970’s) to store information. Yeah, Mehran is old.
+
+
+</body>
+</html>
diff --git a/examples/Khan Sole Academy/soln.py b/examples/Khan Sole Academy/soln.py
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+# a python program that randomly generates simple addition problems for the user,
+# reads in the answer from the user,
+# and then checks to see if they got it right or wrong,
+# until the user appears to have mastered the material.
+
+#import the random library
+import random
+
+#define your function
+def main():
+
+    #we set the number of iterations to 0 as our starting value
+    iteration = 0
+
+    #we use a while loop so the keeps running as long as the user defined conditions are true
+    while True:
+
+        #since we want the program to end after 3 correct consecutive answers,
+        #we state this condition in an 'if' statement
+        if iteration == 3:
+            print('Congratulations! You mastered addition.')
+
+            #'break' keyword breaks out of the loop (ends the program)
+            break
+
+        #if the 'if' block above is wrong, the 'else' code block would run
+        else:
+            num_one = random.randint(10, 99)
+            num_two = random.randint(10, 99)
+            result = num_one + num_two
+
+            #we use the f formatting to set values of the variable names in curly brackets at
+            #the appropriate positions
+            print(f'What is {num_one} + {num_two}?')
+
+            #we enable the user type in their answers and we convert it to a float using the
+            #'float' keyword
+            answer = float(input('Your answer: '))
+
+        #we define conditions to test the correctness of the user's input (answer)
+        if answer == result:
+
+            #we increase the value of our iteration (we increase the starting value by 1)
+            iteration += 1
+
+            #the use of '/' is called escaping. It is used to inform the interpreter that,
+            #the character is part of a string
+            print(f'Correct! You\'ve gotten {iteration} correct in a row.')
+
+        else:
+            print(f'Incorrect. The expected answer is {result}.')
+
+            #the interation value is reduced by one, so the iteration starts counting all over from 1,
+            #when the if block above is true
+            iteration -= iteration
+
+#call your function
+if __name__ == '__main__':
+    main()
diff --git a/examples/Khan Sole Academy/title.txt b/examples/Khan Sole Academy/title.txt
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+The title of this solved example is Khan Sole Academy
diff --git a/examples/index-game/credit.txt b/examples/index-game/credit.txt
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+The example was solved by Mbaoma Chioma Mary (Section Leader for Section 223)
diff --git a/examples/index-game/index.html b/examples/index-game/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>The Index Game </title>
+<style>
+    table, td {
+    border: 1px solid black;
+    border-collapse: collapse;
+    }
+    td {
+    padding: 1px;
+    }
+</style>
+</head>
+<body>
+    We are going to take the first step into data science. You will learn about lists and files! <br>
+    <h3> 1. The Index Game </h3>
+As a warmup, read this code and play the game a few times. Use this mental model of the list: <br>
+<table style="width: 40%">
+        <tr>
+            <th colspan = '5'> Value </th>
+            <td> 'Julie' </td>
+            <td> 'Mehran' </td>
+            <td> 'Simba' </td>
+            <td> 'Ayesha' </td>
+            <td> 'Karel' </td>
+        </tr> <br>
+        <tr>
+            <th colspan = '5'> Index </th>
+            <td> 0 </td>
+            <td> 1 </td>
+            <td> 2 </td>
+            <td> 3 </td>
+            <td> 4 </td>
+        </tr> <br>
+    </table> <br>
+
+    <font color="blue"><p style  = "margin-left: 40px">   def main(): </font><br>
+    <p style  = "margin-left: 60px"><font color="red">  # 1. Understand how to create a list and add values </font><br>
+    <font color="red"> # A list is an ordered collection of values </font><br>
+    names = [<font color="blue">'Julie', 'Mehran', 'Simba', 'Ayesha']  </font><br>
+    names.append(<font color="blue"> 'Karel'  </font>) <br>
+    <font color="red"> # 2. Understand how to loop over a list </font><br>
+    <font color="red"> # this prints the list to the screen one value at a time </font><br>
+    <font color="blue">for </font> value <font color="blue">in </font> names: <br>
+        print(value) <br>
+    <font color="red"> # 3. Understand how to look up the length of a list </font><br>
+    <font color="red"> # use randint to select a valid "index" </font><br>
+    max_index = len(names) - 1 <br>
+    index = random.randint(0, max_index) <br>
+    <font color="red"> # 4. Understand how to get a value by its index </font><br>
+    <font color="red"> # get the item at the chosen index </font><br>
+    correct_answer = names[index] <br>
+    <font color="red"> # This is just like in Khansole Academy... </font><br>
+    <font color="red"> # prompt the user for an answer, check if it is correct </font><br>
+    prompt = <font color="blue">'who is in index...' </font> + str(index)+ <font color="blue"> '? ' </font><br>
+    answer = input(prompt) <br>
+    <font color="blue"> if </font> answer == correct_answer:<br>
+    print(<font color="blue">'Good job'</font>)<br>
+    else:<br>
+        print(<font color="blue">'Correct answer was' </font>, correct_answer) </p><br>
+
+</body>
+</html>
diff --git a/examples/index-game/soln.py b/examples/index-game/soln.py
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+import random
+
+def main():
+    #we set up a list of items
+    names = ['Julie', 'Mehran', 'Simba', 'Ayesha', 'Karel']
+
+    #.append is used to add an item to the end of a list
+    names.append('Omar')
+
+    #we use a for loop to iterate through the list and print out individual members of the list
+    for name in names:
+        print(name)
+
+    #len is used to get the length of a list
+    #i.e number of items in the list
+    length_of_list = len(names)
+
+    #index of a list starts its count from 0
+    max_index = length_of_list - 1
+
+    #f formats are used to print out strings
+    #te=he value in brace brakets can be any data type
+    print(f' the list has {length_of_list} items')
+    print(f'the list has a maximum index of {max_index}')
+
+    #we set the variable name 'index' to a random value provided the value is a valid index
+    index = random.randint(0,max_index)
+
+    #item_index prints the item at the random index above
+    item_index = names[index]
+    print(f'a random index is {index}')
+    print(f'an item at a randomly selected index is {item_index}')
+
+    #who is in what index
+    print(names)
+    prompt = input(f'Who is at index {index}?:  ')
+    correct_answer = names[index]
+
+    #it is possible to assign two or more variable names to two or more values
+    #the .lower is used to set the values of prompt and correct_answer to lowercase to ensure that
+    #no matter the format the user enters the values, the interpreter converts it to lowercase
+    prompt , correct_answer = prompt.lower() , correct_answer.lower()
+    if prompt == correct_answer:
+        print('Correct!')
+    else:
+        print(f'Correct answer is, {correct_answer}')
+if __name__ == '__main__':
+    main()
diff --git a/examples/index-game/title.txt b/examples/index-game/title.txt
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+The title of this solved example is Index Game  (Python solution)
diff --git a/examples/liftoff/credit.txt b/examples/liftoff/credit.txt
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+This solved example was written by Mbaoma Chioma Mary (Section Leader of Section 223)
diff --git a/examples/liftoff/index.html b/examples/liftoff/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Liftoff</title>
+</head>
+<body>
+Write a program in the file liftoff.py that prints out the calls for a spaceship that is
+about to launch. Countdown the numbers from 10 to 1 and then write “Liftoff!” Your
+program should include a for loop using range. A sample run of the program is below. <br>
+10 <br>
+9 <br>
+8 <br>
+7 <br>
+6 <br>
+5 <br>
+4 <br>
+3 <br>
+2 <br>
+1 <br>
+Liftoff!
+</body>
+</html>
diff --git a/examples/liftoff/soln.py b/examples/liftoff/soln.py
@@ -0,0 +1,26 @@
+#a program that works like a countdown call
+#the countdown runs from 10 -1 and then prints 'Liftoff'
+
+#define your function
+def main():
+
+    #we use a for loop and the range funstion which has this format
+    #range(start, stop, step)
+    #start - starting value
+    #stop - stopping value
+    #step - format of printing the generated numbers
+    #we set the step value to a negative index so the countdown starts printing from the last
+    #number in the range (10) and stops at the first number (1)
+    for num in range(10,0,-1):
+
+        #we print out the 'num' values in the range
+        print(num)
+
+    #we print 'LIFTOFF!' outside of the loop so it appears at the end of the countdown and not
+    #inside the countdown sequence
+    print('Liftoff!')
+
+#call your function
+if __name__ == '__main__':
+    main()
+
diff --git a/examples/liftoff/title.txt b/examples/liftoff/title.txt
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+The title of this solved example is Liftoff and it falls under the Sandcastles problem (Python solution)
diff --git a/examples/random_numbers/credit.txt b/examples/random_numbers/credit.txt
@@ -0,0 +1 @@
+This solved example was written by Mbaoma Chioma Mary (Section Leader of Section 223)
diff --git a/examples/random_numbers/index.html b/examples/random_numbers/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Random numbers</title>
+</head>
+<body>
+Write a program in the file random_numbers.py that prints 10 random integers (each
+random integer should have a value between 0 and 100, inclusive). Your program
+should use a constant named NUM_RANDOM, which determines the number of random
+numbers to print (with a value of 10). It should also use constants named MIN_RANDOM
+and MAX_RANDOM to determine the minimal and maximal values of the random numbers
+generated (with respective values 0 and 100). To generate random numbers, you should
+use the function random.randint() from Python’s random library. <br>
+Example: <br>
+35 <br>
+10 <br>
+45 <br>
+59 <br>
+45 <br>
+100 <br>
+8 <br>
+31 <br>
+48 <br>
+6 <br>
+It's alright if your code does not generate the exact numbers above.
+</body>
+</html>
diff --git a/examples/random_numbers/soln.py b/examples/random_numbers/soln.py
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+#we want to print 10 random numbers within the range of 0 and 100 (100 inclusive)
+#we import the random library because we are printing a list of RANDOM numbers
+import random
+
+#define your function
+def main():
+    #set the length of our proposed list of numbers
+    num_random = 10
+
+    #we set our starting value
+    min_random = 0
+
+    #we set our stopping value
+    max_random = 100
+
+    #we use a 'for' loop becuase we know the range/size of our list (i.e. 10)
+    #range is an inbuilt function in python that is used to specify the length of a list
+    #or number of iterations a funtion should undertake
+    for i in range(num_random):
+
+        #the variable name 'random_num' contains the random integer to be generated by our script
+        #random.randint has this format random.randint(start, end)
+        random_num = random.randint(min_random, max_random)
+
+        #we get a list of 10 numbers because we combined the random.randint function with a for loop
+        print(random_num)
+
+#call the function
+if __name__ == '__main__':
+    main()
diff --git a/examples/random_numbers/title.txt b/examples/random_numbers/title.txt
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+The title of this solved example is Random numbers and it falls under the Sandcastles problem.
diff --git a/examples/stroop/credit.txt b/examples/stroop/credit.txt
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+This worked example was solved by Mbaoma Chioma Mary, section 223 leader
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		This solved example was written by Mbaoma Chioma Mary (Section Leader of Section 223)
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		The title of this solved example is Khan Sole Academy
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		The example was solved by Mbaoma Chioma Mary (Section Leader for Section 223)
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		The title of this solved example is Index Game (Python solution)
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		The title of this solved example is Liftoff and it falls under the Sandcastles problem (Python solution)
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		@@ -0,0 +1 @@
		The title of this solved example is Random numbers and it falls under the Sandcastles problem.
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		This worked example was solved by Mbaoma Chioma Mary, section 223 leader