Python Projects for Beginners a ten-Week Bootcamp Approach to Python Programming

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Python Projects for Beginners A Ten Week Bootcamp Approach to Python

Bu sahifa navigatsiya:

• Only Vowels
• Wednesday: While Loops We’ll be going over the other type of loop today, the while
• While Loops .” Writing a While Loop Like a for loop, the while loop starts out with the keyword “while

TUESDAY EXERCISES

1.	Divisible by Three: Write a for loop that prints out all numbers from 1 to 100 that are divisible by three.
2.	Only Vowels: Ask for user input, and write a for loop that will output all the vowels within it. For example: >>> "Hello" ➔ "eo"

today was spent learning all about for loops and how they work. Looping allows us to run the same lines of code several times.
Wednesday: While Loops
We’ll be going over the other type of loop today, the while loop. Yesterday we saw how loops work, and why we would use a for loop. A while loop is generally used when you need to loop based on a condition rather than counting. Today will be all about condition-based looping.
To follow along with this lesson, let’s continue from our previous notebook file
“Week_04” and simply add a markdown cell at the bottom that says, “While Loops.”

Writing a While Loop

Like a for loop, the while loop starts out with the keyword “while”. Following that, we have a conditional like we would use to write an if statement. Let’s see an example:

# writing your first while loop health = 10 while health > 0: print(health) health -= 1 # forgetting this line will result in infinite loop

Go ahead and run that cell. This will continue to print out the value of health until the condition is met. In this case, once health is no longer greater than zero, the loop stops running. On the last line, we decrement health by one, so each iteration reduces health closer to zero. If we didn’t decrement health at any point in time, this would become an infinite loop (which is bad).

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