Python If, elif, and else condition

This tutorial is Python If, elif, and else statements. Controlling the flow of the program by making conditions on that basis specific block of code will execute. If the statement is making a condition or decision withing a program in Python.

if Condiction

The condition is true then execute the block of code and otherwise execute the next condition.

Syntax

if condition :
    # true statement
next statement

Example

number = 30
if number%2 == 0 : 
    print("Even number")
print ("Number is :", number)

Output:

Even number
Number is : 30

if-else condition

If the condition only executes condition returns true if the condition returns false for we use else condition with if.

Syntax

if condition :
    # true statement
else:
    # false statement

next statement

Example

number = 11
if number%2 == 0 :
    print("Even number")
else :
    print("Odd number")

print("Number is :",number)

Output:

Odd number
Number is : 11

Elif condition

The condition is not true then we check again with other conditions using Elif.

Syntax

if condition:
    # true statement1
elif condition:
    # true statement2
elif condition:
    # true statement3
…
…
else:
    # false statement

# next statement

Example

number = 33
if number == 11:
    print("If first statement")
elif number == 22:
    print("If second statement")
elif number == 33:
    print("If third statement")
else:
    print("Else fourth statement")
print("Number is :",number)

Output:
If third statement
Number is : 33

Nesting

Generally, use nested if condition using this we define if condition within another if condition. see the following code below:

Syntax

if condition:
    if condition:
        # true statement
    else:
        # false statement
else:
    if condition:
        # true statement
    else:
        # false statement
# next statement

Example

number = 55
if number == 11:
    if number == 55:
        print ("First statement")
    else :
        print ("Second statement")
else:
    if number == 55:
        print ("Third statement")
    else :
        print ("Fourth statement")
print("Number is :",number)

Output:
Third statement
Number is : 55