Julia function keyword | Create user-defined functions in Julia

Keywords are the reserved words in Julia which have a predefined meaning to the compiler. These keywords are used to reduce the number of lines in code. Keywords in Julia can’t be used as variable names.

'function' keyword is used to create user-defined functions in Julia. These functions are reusable codes that can be called from anywhere in the code with the name assigned to the function.

Syntax:

function function_name
    Statement
    Statement
end

Note: 'end' keyword is used to mark the ending of a function. Everything between the function keyword and end keyword is considered to be the body of the function.

Example:

# Julia program to illustrate
# the use of 'function' keyword

# Defining a function
function func()
    println("this is a function")
end

# Function call
func()

Output:

this is a function

Creating Functions with arguments

Functions in Julia also accept arguments. These functions are also created in the same way by using the 'function' keyword.

Syntax:

function function_name(argument1, argument2, ...)
    statement
    statement
end

Example:

# Defining a function with arguments
function add_fn(x, y)
    println(x + y)
end

# Calling defined function
add_fn(10, 8)

Output:

18