Python if-else Statement

It is also called conditional Statement means if the condition is true then the condition inside it will execute otherwise else part is execute.In Python Programming every else must have if but every if may have else.the syntax of if else condition is

Syntax

if expression:
    //statement
    //statement
else:
    //statement
    //statement
        

Example

x=10
if x==10:
    print("SmallCode!")
else:
    print("Vicky Chaurasiya")
        

Output

SmallCode
Here x=10 and the condition is 10==10 it is absolutely correct,then the statement of if will execute.
        

Other form of if else

if-else ladder

It is modified form of if-else statement means if the we have multiple number of condition along with multiple output or if we have multiple number of choices then we use if-else ladder form.the syntax of if else condition is

Syntax

if expression:
    //statement
    //statement
elif expression:
    //statement
    //statement
else:
    //statement
    //statement
        

Example

x=10
if x>5:
    print("x is less then 5")
elif x==10:
    print("x is equal to 10");
else:
    print("x is not equal to 5 and not less then 5")
        

Output

x is equal to 10
Here x=10 and in the first condition is (10==5) but it is not equal and then it check else if condtion and it is equal (10==10) and it is absolutely correct,then the statement of "else if" will execute.
        

Nested if-else

It is also modified form of if-else statement means if the we have more the one condition then we use Nested and the syntax of if else condition is

Syntax

if expression:
    if expression: 
        //statement1
        //statement2
    else:
        //statement3
        //statement4
        

Example

year=int(input("Please Enter any year="))
if year%4 == 0:
    if year%100 == 0:  
        if year%400 == 0: 
            print(year," is a Leap Year.")
        else: 
            print(year," is not the Leap Year.") 
    else:
          print(year," is a Leap Year.") 
else: 
    print(year," is not the Leap Year.")
        

Output

Please Enter any year=2020
2020 is a leap year.