Nodejs Number Sum sum(a)

Method Source Code

Number.prototype.sum = function (a) {
    return a = a || 0,this + a;
}
num = 4;/*from w w  w  .  j a v a2 s.c o  m*/
num.sum(4).sum(5).sum(6);

Related

1. sum( number )

   Number.prototype.sum = function ( number ) {
       return this + Number(number);
   };
   var one = 1;
   console.log( one.sum(1) );
   console.log( one.sum(" 3.04 ") );
   console.log( one.sum("w") );
   

2. sum(num)

   Number.prototype.sum = function(num) {
       return this + num;
   };