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 » Python Tutorials » Python if-elif-else Statement

Python if-elif-else Statement

If statement

The if statement is used to execute a block of code based on a specific condition. The syntax of the if statement is as follows:
 

if condition:
	code-block

The body code block is only executed if the condition is evaluated to be true. Let’s take a look at an example of using if statement.

x = 10
if x > 0:
    print('x is greater than 0')

if-else statement

if-else statement is used to execute a block of code when the if condition is true otherwise it will execute the block of code of the else statement. The syntax of if-else statement is as follows:
 

if if-condition:
	if-body
else:
	else-body

Here is an example of using if-else statement:

language = 'Python'
if (language == 'Python'):
    print('You are programming Python')
else:
    print('What language are you programming?')

if-elif-else statement

Sometimes, you want to have multiple conditions to check to execute a specific code block. In these cases, you need to use if-elif-else statement. The common syntax of if-elif-else statement is as below:
 

if if-condition:
	if-code-block
elif condition-1:
	code-block-1 
elif condition-2:
	code-block-2
elif condition-n:
	code-block-n
else:
	code-block-else

Basically if the if-condition is evaluated to be true, the if-code-block will execute. If any condition from condition-1 to condition-n is true, the corresponding code-block-i will be executed. Otherwise the code-block-else will be executed.

Let’s take a look at an example of using if-elif-else statement.
 

language = "Python"
if (language == "Java"):
    print("write once, run anywhere")
elif(language == "C#"):
    print("another version of Java?")
elif(language == "Python"):
    print("remarkable power with very clear syntax")
else:
    print("What is ",language,”?”)

Note that the if, if-else,if-else-if can be nested.