Sometimes the programmer needs to check the evaluation of certain expressions and determine whether they evaluate to True or False. If the expression evaluates to False, the program execution follows a different path than it would if the expression had evaluated to True.

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