In this tutorial, we will learn about if statements in Python. We will cover the basics of conditional execution using if statements.
An if statement is a conditional statement that executes a block of code if a specified condition is true.
The syntax for the if statement in Python is:
if condition:
# Code block to execute if condition is true
The if statement evaluates the specified condition. If the condition is true, the code block inside the if statement is executed; otherwise, it is skipped.
The following is the flowchart of how execution flows from start to the end of an if statement.
num
.num
.num
is even.num
is even or not.num = 10
if num % 2 == 0:
print(f'{num} is even.')
10 is even.
str
.str
.str
starts with a specific value.str = 'Hello, world!'
if str.startswith('Hello'):
print('String starts with "Hello".')
String starts with "Hello".
num
.num
.num
is positive.num
is positive or not.num = -5
if num > 0:
print(f'{num} is positive.')