Ruby | Methods

Method is a collection of statements that perform some specific task and return the result. Methods are time savers and help the user to reuse the code without retyping the code. Defining & Calling the method: In Ruby, the method defines with the help of def keyword followed by method_name and end with end keyword. A method must be defined before calling and the name of the method should be in lowercase. Methods are simply called by its name. You can simply write the name of method whenever you call a method. 

Syntax: 

def method_name
# Statement 1
# Statement 2
.
.
end

Example: 

Output:

Welcome to GFG portal

Passing parameters to methods: In Ruby, parameter passing is similar to other programming language's parameter passing i.e simply write the parameters in the brackets (). 

Syntax:

def method_name(var1, var2, var3)
# Statement 1
# Statement 2
.
.
end

Example: 

Output:

First parameter is GeeksforGeeks
First parameter is Sudo

Without Parameters

First parameter is GFG
First parameter is G4G

Variable Number of Parameters: Ruby allows the programmer to define a method that can take the variable number of arguments. It is useful when the user doesn't know the number of parameters to be passed while defining the method. 

Syntax:

def method_name(*variable_name)
# Statement 1
# Statement 2
.
.
end

Example: 

Output:

Number of parameters is: 2
Parameters are: GFG
Parameters are: G4G
Number of parameters is: 1
Parameters are: GeeksforGeeks

Return statement in Methods: Return statement used to returns one or more values. By default, a method always returns the last statement that was evaluated in the body of the method. 'return' keyword is used to return the statements. 

Example: 

Output:

The result is: 49