The Python If Else Statement is an extension to the If Statement (which we discussed in the earlier post). We already seen the If condition, it will only executes the statements when the given condition is true and if the condition is false, it will not execute statements.
In real world, it would be nice to execute something when the condition fails. To do so, Python If else statement is used. Here, Else statement will execute the statements when the condition fails. Let us see the syntax of If Else statement in Python.
Python If Else Syntax
The syntax of If Else Statement in Python is as follows:
if (Test condition):
# If the condition is TRUE then these statements will be executed
True statements
else
# If the condition is FALSE then these statements will be executed
False statements
NOTE: Once you hit the enter after semicolon, python will start the next line with Tab space. This Tab space acts as curly braces ({ }) in other programming languages.
If the test condition present in the above structure is true then True statements execute, otherwise, False statements executed.
TIP: By clicking backspace you can exit from the If Else statement block
Flow Chart for Python If Else Statement
The flow chart of the Python If else statement is as shown below
Python If Else Statement Example
In this Python If Else statement program we are going to place 4 different print statements. If the condition is true we will print 2 different statements, if the condition is false we will print another 2 statements using Python if else statement.
Within the Python IDLE, Please select the New File and add the following script in that new file
# Example for Python If Else Statement
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
Once you are done, Please save this Python file. Next, Let us run the script by clicking the Run Module or simply click F5
Once you click on Run Module, Our shell will pop up with message “Please Enter Your Subject Marks:” .
OUTPUT 1: From the below If else example screenshot you can observe that we enter 60 as marks, which is greater than 50 that’s why it printed (s1 and s2 statement) inside the If statement block.
To demonstrate the Python If else statement, let us see what happens when we enter less than 50. From the below screenshot you can observe that we enter 30 as marks. It means Condition is FALSE so, s3 and s4 statements inside the else block will print as an output.
In this If Else Statement example, First, we declared marks variable and asks the user to enter any integer value. int() restrict the user not to enter non integer values
marks = int(input(" Please Enter Your Subject Marks: "))
If you look at the python if else statement, If Value stored in the marks variable is greater than or equal to 50 then following print statement will execute.
if marks >= 50:
print(" Congratulations ") #s1
print(" You cleared the subject ") #s2
If it is less than 50, below statement (inside the Else) will execute.
print(" You Failed") #s3
print(" Better Luck Next Time") #s4
