Nodejs Number Sign sign()

Method Source Code

Math.sign = function(x) {
  if (x > 0) {
    return 1/* w w  w . ja  va2  s .c o  m*/
  } else if (x < 0) {
    return -1
  } else {
    return 0
  }
}

Related

1. sign(d)

   Math.prototype.sign = function(d) {
     return d<0 ? -1 : 1;
   };
   

2. sign(x)

   Math.sign = function(x) {
     x = +x;
     if (x === 0 || isNaN(x))
       return x;
     return x > 0 ? 1 : -1;
   

3. sign(x)

   Math.sign = Math.sign || function (x) {
       return x === 0 ? 0 : x / Math.abs(x);
   };
   

4. sign(x)

   Math.sign = function(x) {
     if (x > 0) {
       return 1
     } else if (x < 0) {
       return -1
     } else {
       return 0