For Loops

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 Previous Lesson

In Python, sometimes, you might have to repeat some things many times and sometimes, just copy pasting a set of lines might be really taxing. So, we have something called for loops. With for loops, you can repeat a set of lines however many times you want. Here is an example below.

•  For Loop Example

You can write a for loop like this:

• for variable in range(number):
•    # The set of lines you want to repeat

The variable in the for loop keeps track of the number of times you have ran the for loop. In the previous example, that variable was counter. Once that variable is equal to the range (The number of times you want to repeat the for loop), the for loop ends. 

Here is the basic syntax for the range:

• The range is a basic function in Python that allows you us to start at a certain value, stop at a certain value, and increment by a certain value. 

• When there is only one number in the range, then it shows that the starting value is 0, the stopping value is the number, and the incrementation value is 1
  •  Example

• When there are two numbers in the range, then it shows that the starting value is the first number, the stopping value is the second number and the incrementation value is 1.
  •  Example

• When there are three numbers in the range, then it shows that the starting value is the first number, the stopping value is the second number, and the incrementation value is the third number.
  •  Example

Make sure to write a colon after the for loop as shown in the example and also indent the following lines you want repeated.