If assign in Ruby

In Ruby, if is used as a conditional statement to check if certain conditions are true or false.

The basic syntax for using the if statement is as follows:

if condition
  # code to execute if condition is true
else
  # code to execute if condition is false
end

The else block is optional. If the condition is true, the code inside the if block will be executed; if the condition is false, the code inside the else block (if any) will be executed.

Here are some examples of using if in Ruby:

Example 1: Checking if a number is even or odd

num = 12
if num % 2 == 0
  puts "#{num} is even"
else
  puts "#{num} is odd"
end

Output: "12 is even"

Example 2: Checking if a user's age is greater than or equal to 18

age = 22
if age >= 18
  puts "You are an adult"
else
  puts "You are not an adult yet"
end

Output: "You are an adult"

Example 3: Checking if a string is empty

string = ""
if string.empty?
  puts "The string is empty"
else
  puts "The string is not empty"
end

Output: "The string is empty"

In summary, if allows you to control the flow of your code based on certain conditions.