0% completed
The if
, elif
, and else
statements in Python are fundamental to controlling the flow of execution based on conditions. These statements allow you to execute specific blocks of code depending on whether certain conditions are true or false.
Below, we’ll break down how to use these constructs effectively across three sections, each focused on a different aspect of conditional execution.
The if Statement
The if
statement is used to execute a block of code only if a specified condition is true.
Syntax
condition
: This can be any expression that evaluates toTrue
orFalse
. If the condition isTrue
, the code inside the block will execute.
Example
Explanation:
x = 10
: Set the variablex
to 10.if x > 5
: Check ifx
is greater than 5.print(...)
: Sincex
is indeed greater than 5, the message "x is greater than 5" is printed to the console.
The else Statement
The else
statement complements the if
statement and specifies a block of code to be executed if the if
condition is false.
Syntax
- The
else
block only executes when theif
statement’s condition evaluates toFalse
.
Example
Explanation:
x = 3
: Set the variablex
to 3.if x > 5
: Check ifx
is greater than 5.else
: Sincex
is not greater than 5, theelse
block executes.print(...)
: Prints "x is not greater than 5".
The elif Statement
The elif
(else if) statement allows you to check multiple expressions for True
and execute a block of code as soon as one of the conditions evaluates to True
.
Syntax
elif
allows for multiple conditions to be checked, each one after the previous one has evaluated toFalse
.
Example
Explanation:
x = 15
: Set the variablex
to 15.if x > 20
: Check ifx
is greater than 20.elif x > 10
: Sincex
is not greater than 20 but is greater than 10, execute this block.print(...)
: Prints "x is greater than 10 but not more than 20".
This lesson provides a clear, step-by-step guide to using if
, elif
, and else
statements in Python, covering their purposes, syntaxes, and practical examples with detailed explanations.
.....
.....
.....
Table of Contents
Contents are not accessible
Contents are not accessible
Contents are not accessible
Contents are not accessible
Contents are not accessible