Why methods always return a value in Ruby

Introduction

In Ruby, every method gives back a result when it finishes. This helps you use that result right away without extra steps.

When you want to get a calculation result from a method and use it immediately.

When you need to check if something is true or false after running a method.

When you want to build a list or string step-by-step using method results.

When you want to pass the result of one method directly into another method.

When you want to write clean code that flows naturally by chaining method calls.

Syntax

Ruby

def method_name
  # some code
  last_expression
end

The value of the last line in the method is automatically returned.

You do not need to write the 'return' keyword unless you want to return early.

Examples

This method adds two numbers and returns the sum automatically.

Ruby

def add(a, b)
  a + b
end

This method returns a greeting string using the name given.

Ruby

def greet(name)
  "Hello, #{name}!"
end

This method returns true early if the number is even, otherwise false.

Ruby

def check_even(num)
  return true if num % 2 == 0
  false
end

Sample Program

This program defines a method that multiplies two numbers and returns the product. Then it prints the result.

Ruby

def multiply(x, y)
  x * y
end

result = multiply(4, 5)
puts "The result is #{result}"

Important Notes

Even if you don't write 'return', Ruby sends back the last thing it did in the method.

If you want to stop and send back a value early, use 'return'.

This feature makes Ruby code shorter and easier to read.

Summary

Ruby methods always give back a value automatically.

The last line in the method is what gets returned unless you use 'return' earlier.

This helps you write clean and simple code that flows well.