Python If Else and Nested If Else - Tutorial Kart

[Pages:4]Python If Else and Nested If Else

Python If Else

Python If Else ? Basic idea of an if else condition block is that, when the condition is satisfied, the statements in the if block are executed, and when the condition is not satisfied, the statements in the else block are executed.

Syntax ? Python If-Else

if : statements

else: statements

A pictorial representation of if-else block is given below :

Python If Else Statement

Example 1 ? Python If Else

In this example, we will write an if-else statement. The condition checks if product of two numbers is 20 or not. example.py ? Python Program

number_1 = 5 number_2 = 6 if number_1 * number_2 == 20:

print("The condition is true.") print("Inside if block") print("Statement in if block") else: print("The condition is false.") print("Inside else block") print("Statement in else block") print("Outside if-else condition block.")

Output

The condition is false. Inside else block Statement in else block Outside if-else condition block.

Note : Observe the indentation and alignment of the statements inside the if-block or else-block. Unlike programming languages like java or c where the statements are enclosed in curly braces, python considers the alignment of statements to consider them in the block.

Nested if-else

This is an extension for the idea of if-else block. Any statement in the if or else blocks could be another if or ifelse block.

Example 2 ? Nested If-Else

In this example, we will write a nested if-else statement. If block contains an if-else statement inside it, and else block also contains an if-else block inside it.

example.py ? Python Program

number_1 = 5 number_2 = 6 if number_1 * number_2 == 20:

print("The condition is true.") print("Inside if block") if (number_1 == number_2):

print("Both numbers are same") else:

print("Both numbers are not same") else:

print("The if condition is false.") print("Inside else block") if number_1 + number_2 == 11:

print("Addition of two numbers equal 11.") else:

print("Addition of two numbers is not equal to 11.") print("Outside nested if-else condition block.")

Output

The if condition is false. Inside else block Addition of two numbers equal 11. Outside nested if-else condition block.

Conclusion

In this Python Tutorial, we have learnt if-else conditional statement, and how any statement in if or else block could be another if or if-else conditional statements.

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