Week 1 Exercises

Week 1: Python Basics / Finger Exercises

Exercise: hello world

Write a piece of Python code that prints out the string hello world

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My solution: hello_world.py

Exercise: happy

Write a piece of Python code that prints out the string 'hello world' if the value of an integer variable, happy, is strictly greater than 2.

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My solution: happy.py

Exercise: vara varb

Assume that two variables, varA and varB, are assigned values, either numbers or strings.

Write a piece of Python code that evaluates varA and varB, and then prints out one of the following messages:

• "string involved" if either varA or varB are strings
• "bigger" if varA is larger than varB
• "equal" if varA is equal to varB
• "smaller" if varA is smaller than varB

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My solution: vara_varb.py

Exercise: while

In this problem you'll be given a chance to practice writing some while loops.

1. Convert the following into code that uses a while loop.

   prints 2

   prints 4

   prints 6

   prints 8

   prints 10

   prints Goodbye!

2. Convert the following into code that uses a while loop.

   prints Hello!

   prints 10

   prints 8

   prints 6

   prints 4

   prints 2

3. Write a while loop that sums the values 1 through end, inclusive. end is a variable that we define for you. So, for example, if we define end to be 6, your code should print out the result:

21

which is 1 + 2 + 3 + 4 + 5 + 6.

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My solution: while.py

Exercise: for

In this problem you'll be given a chance to practice writing some for loops.

1. Convert the following code into code that uses a for loop.

   prints 2

   prints 4

   prints 6

   prints 8

   prints 10

   prints Goodbye!

2. Convert the following code into code that uses a for loop.

   prints Hello!

   prints 10

   prints 8

   prints 6

   prints 4

   prints 2

3. Write a for loop that sums the values 1 through end, inclusive. end is a variable that we define for you. So, for example, if we define end to be 6, your code should print out the result:

   21

   which is 1 + 2 + 3 + 4 + 5 + 6.

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My solution: for.py