Sometimes the programmer needs to check the evaluation of certain expression(s), whether the expression(s) evaluate to True or False. If the expression evaluates to False, then the program execution follows a different path than it would have if the expression had evaluated to True.

Based on this, the conditional statements are further classified into the following types: if, if......else, elif, nested if.

if Statement:

A simple if statement works on the following principle:

• Execute the block of code inside the if statement if the expression evaluates to True.
• Ignore the block of code inside the if statement if the expression evaluates to False and return to the code outside the if statement.

Example:

applePrice = 180
budget = 200
if (applePrice <= budget):
    print("Alexa, add 1kg Apples to the cart.")

Output:

Alexa, add 1kg Apples to the cart.