if in Python | if else in Python | if elif in Python | nested if in Python | CBSE | flow control
In this Python tutorial for beginners, we will learn If statement in Python. This Python tutorial video covers: simple if statement, if else statement, if elif statement, and nested if statement. We have discussed these four different types of if statements with examples.
If in Python :
The if statement in Python is a powerful decision making statement and used to control the flow of execution of statements.
It is basically a two-way decision statement.
The if statement allows the computer to evaluate the condition first and then, depending on whether the value of the condition is true or false, it transfers the control to a particular statement.
The different forms of if statements are:
1. Simple if statement
2. The if...else statement
3. The if - elif statement
4. The nested if statement.
1. Simple if statement:
The most common type of flow control statement is the if statement.
An if statement tests a condition, and if this condition is True, the block following the if statement will execute. The block is skipped if the condition is False.
2. If else :
An if clause can optionally be followed by an else statement.
An else statement doesn’t have a condition, and in code, an else statement always consists of
• The else keyword
• A colon
• Starting on the next line, an indented block of code (called the else clause)
3.if elif
An elif statement always consists of :
• The elif keyword
• An expression that evaluates to True or False
• A colon
• Starting on the next line, an indented block of code (called the elif clause)
4. Nested if statement:
An if statement can be inside another if or elif or else statement to form a nested if statement.
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