if Statement

The if statement is used to conditionally execute a block of code.

Syntax

if condition:
    statement

if Statement

x = 10
if x > 5:
    print("x is greater than 5")

x = 10
y = 3
if x > 5 and y < 7:
    print("x is greater than 5")

else Statement

The else statement is used to execute a block of code if the condition in the if statement is false.

Syntax

if condition:
    statement
else:
    statement

else Statement

Example

x = 10
if x > 15:
    print("x is greater than 15")
else:
    print("x is not greater than 15")

elif Statement

The elif (short for else if) statement is used to check multiple expressions for true and execute a block of code as soon as one of the conditions is true.

Syntax

if condition1:
    statement
elif condition2:
    statement
else:
    statement

elif Statement

Example

x = 10
if x > 15:
    print("x is greater than 15")
elif x > 5:
    print("x is greater than 5 but not greater than 15")
else:
    print("x is not greater than 5")

Exercise: A More Advanced Calculator

http://gg.gg/1b80sx