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The syntax of the for statement is given below:
for <variable> in <iterator>:
Statements
Program 4: To calculate the squares of all the numbers present in the given list.
[1, 2, 4, 6, 11, 20]
Program 5: To find the sum of all the numbers stored in a given list.
[6, 5, 3, 8, 4, 2, 5, 4, 11]
Using the range() Function
The range() function is an in-built function of Python. This function generates a list which
is a sequence type. A sequence is a succession of values bound together by a single name.
The range() function is used in the for loop to iterate over the numbers.
The general syntax of using the range() function is given below:
range(n): Generates a set of whole numbers starting from 0 to (n–1).
Example: range(6) is equivalent to [0, 1, 2, 3, 4, 5].
range(start, stop): Generates a set of whole numbers starting from ‘start’ to ‘stop–1’.
Example: range(3, 9) is equivalent to [4, 5, 6, 7, 8].
range(start, stop, step_size): By default, the value of the step_size = 1 and numbers
generated with a difference of 1. However, we can generate numbers by specifying the
value of step_size according to our requirement.
Example: range(1, 14, 2) is equivalent to [1, 3, 5, 7, 9,11,13].
Python—Conditionals and Loops 93

