The Python If Else Statement is an extension to the If (which we discussed in the earlier post). If condition only executes the code block when the given condition is true and when the condition is false, it will not execute the code.
In the real world, it would be nice to execute something when the expression fails. To do so, the If condition is used and here, the Else block will run some code when the condition fails.
Python If Else Syntax
The syntax of the 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 If else structure is evaluated to true, True statements are executed. When it returns false, a False code is executed.
If Else Statement Example
In this Python If Else statement program, we will 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.
# Example 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 file and run the script file by pressing F5.
For the demo purpose, we enter 60 as marks, which is greater than 50. That’s why if else program printed (s1 and s2) inside the If block.
Please Enter Your Subject Marks: 60
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 ask the user to enter marks. int() restrict the user not to enter non-integer values.
When you look at the if else, the Value stored in the marks variable is greater than or equal to 50, then the following print lines will execute. If it is less than 50, the below code inside the Else will execute.