JavaScript: Rest Parameter

Rest parameters are used to represent variable number of arguments. It is equivalent to Varargs in Java. ‘…’ are used to represent variable number of arguments.

HelloWorld.js

function sum(...arr){
    var sum = 0;
    
    for(data of arr){
        sum += data;
    }
    
    return sum;
}

var x = sum(10, 20);
var y = sum(10, 20, 30, 40);

console.log("x : " + x);
console.log("y : " + y);

Output

x : 30

y : 100

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