IF ELSE in Ruby Language

When it comes to programming, decision-making is a fundamental concept. In the Ruby programming language, as in

many other programming languages, you can make decisions using conditional statements. One of the most commonly used conditional statements in Ruby is the “IF-ELSE” statement. In this post, we’ll explore how to use IF-ELSE statements in Ruby with examples.

IF Statement in Ruby:

The IF statement is used to execute a block of code only if a certain condition is true. Here’s the basic syntax:

if condition
  # Code to execute if condition is true
end

For example, let’s say you want to print a message if a variable x is greater than 10:

x = 12

if x > 10
  puts "x is greater than 10"
end

In this example, “x is greater than 10” will be printed to the console because the condition x > 10 is true.

ELSE Statement in Ruby:

The ELSE statement is used in conjunction with IF to execute a block of code when the condition is false. Here’s the syntax:

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

Let’s modify our previous example to include an ELSE statement:

x = 8

if x > 10
  puts "x is greater than 10"
else
  puts "x is not greater than 10"
end

In this case, “x is not greater than 10” will be printed because the condition x > 10 is false.

ELSIF Statement in Ruby:

You can also handle multiple conditions using the ELSIF statement. It allows you to check multiple conditions in sequence. Here’s the syntax:

if condition1
  # Code to execute if condition1 is true
elsif condition2
  # Code to execute if condition2 is true
else
  # Code to execute if none of the conditions are true
end

Let’s say you want to check if a number is positive, negative, or zero:

num = -5

if num > 0
  puts "Number is positive"
elsif num < 0
  puts "Number is negative"
else
  puts "Number is zero"
end

In this example, “Number is negative” will be printed because num < 0 is true.

Combining Conditions:

You can also combine conditions using logical operators such as && (AND) and || (OR). For instance:

age = 25
income = 50000

if age > 21 && income > 30000
  puts "You qualify for the loan."
else
  puts "You do not qualify for the loan."
end

In this example, “You qualify for the loan” will be printed only if both conditions are true.