The "if" statement in Python is a control flow statement that allows you to execute a block of code only if a specified condition is true.
Here's the syntax for the if statement in Python:
if condition:
block of code to be executed if the condition is true
The condition can be anything that returns a boolean value (True or False). For example, you can use comparison operators like ==, !=, <, >, <=, >=, or logical operators like and, or, not to create the condition.
Here are some examples of how to use the if statement in Python:
Example 1: Check if the value of a variable is greater than 10
x = 15
if x > 10:
print('x is greater than 10')
Output: x is greater than 10
Example 2: Check if a string is empty
string = ""
if not string:
print('The string is empty')
else:
print('The string is not empty')
Output: The string is empty
Example 3: Check if a number is even or odd
number = 7
if number % 2 == 0:
print('The number is even')
else:
print('The number is odd')
Output: The number is odd
In summary, the "if" statement is a powerful tool that allows you to create conditional statements that execute specific blocks of code based on whether a condition is true or not.