Python If Else Statement

The Python If Else Statement is an extension to the If (which we discussed in the earlier post). The If condition will only execute the code block when the given condition is true and when the condition is false, it will not execute the code.

In real-world, it would be nice to execute something when the expression fails. To do so, If condition is used and here, the Else block will run some code when the condition fails. The syntax of the Python If Else Statement is

if (Test condition):
     # The condition is TRUE then these lines will be printed
     True codes
else
     # When the condition evaluates to FALSE then these lines will print
     False codes

When the test condition present in the above Python If else structure is evaluated to true, True statements executed. When it return false, False code executed.

Python If Else Statement Example

In this Python If Else program we are going to place 4 different lines. When the condition is met true, it will display 2 distinct lines, when the conditional expression evaluates to false we will show the other 2 statements using this else block code.

marks = int(input(" Please Enter Your Subject Marks:  "))
if marks >= 50:
    print(" Congratulations ") #s1
    print(" You cleared the subject ") #s2
else:
    print(" You Failed") #s3
    print(" Better Luck Next Time") #s4

Please save this Python file and run the script by pressing F5. We enter 60 as marks, which is greater than 50. That’s why it printed (s1 and s2) inside the If block.

Please Enter Your Subject Marks: 60
Congratulations
You cleared the subject

We entered 30 as marks. It means Condition is FALSE so, s3 and s4 inside the else block will print.

First, we asks the user to enter marks. int() restrict the user not to enter non integer values.

When you look at the python if else, Value stored in the marks variable is greater than or equal to 50, then following print lines will execute. And it is less than 50, below code, inside the Else will execute.