If statement of Python

The If statement of python is similar to that of other languages. The if statement contains a logical expression using which data is compared, and a decision is made based on the result of the comparison.

The syntax of the If statement is:

If expression:

    Statement (s)

Here if statement condition is evaluated first. If condition is true that is, if its value is nonzero then the statement(s) block are executed. Otherwise, the next statement following the statement(s) block is executed.

Note: In python, all the statements indented by the same number of character spaces after a programming construct are considered to be part of a single block of code.  Python uses indentation as its method of grouping statements.

Example:

# ! /usr/bin/python

var1 = 100

If  var1:

            Print “1 – Got a true expression value”’

            Print var1

Var2 = 0

If  var2:

            Print “2 – Got a true expression value”’

            Print var2

Print “Good bye!”

This will produce following result:

1 – Got a true expression value

100

Good bye!