Golang program that uses func with variable argument list

In Golang, a function that can be called with a variable argument list is known as a variadic function. One can pass zero or more arguments in the variadic function. If the last parameter of a function definition is prefixed by ellipsis ..., then the function can accept any number of arguments for that parameter.

Syntax of a variadic function:

func f(elem ...Type)

Here ... operator tells Golang program to store all arguments of Type in elem parameter. After that, Go create an elem variable of the type []Type. Therefore, all the values passed are stored in an elem parameter which is a slice. A slice can also be passed in the argument instead of the argument list, as finally function is converting them into a slice. For more information you can refer to Variadic Functions in Golang

Advantages of using a Variadic Function:

• Passing a slice in a function is very easy.
• Useful when the number of parameters is unknown.
• Increases the readability of the program.

Let's see some of the examples to use functions with variable argument list:

Example 1:

Output:

Sum = 45

Example 2:

A slice can also be used as an argument list.

Output:

Element 1 found at index: 1
Element not present in the list