Reputation: 7283
Certainly a stupid question, please forgive me. My customer wants decimal numbers to display with five digits. For example: 100.34 or 37.459. I was accomplishing this with val.toPrecision (5);
; however, when my numbers get really small, I stop getting what I want. For example, if my number is 0.000347, it displays 0.00034700. Now, I understand why it's doing this, but what I don't know is how to get it to display 0.0003. Any thoughts?
Upvotes: 1
Views: 4579
Reputation: 85
You can use the toFixed method to accomplish this. For example: (0.000347).toFixed(4)
Upvotes: 1
Reputation: 17939
Math.round(0.000347 * 1e4) / 1e4
Or with toFixed
:
Number.prototype.toNDigits = function (n) {
return (Math.abs(this) < 1) ?
this.toFixed(n - 1) :
this.toPrecision(n);
};
Upvotes: 5
Reputation: 55308
Our problem is with numbers less than 1 obviously. So catch them and deal them separately
function SetPrecisionToFive(n){
return (n > 1) ? n.toPrecision (5) : (Math.round(n * 1e4) / 1e4).toString();
}
Upvotes: 2
Reputation: 4238
The Javascript toFixed() function will truncate small numbers to a fixed decimal precision, eg:
var num = .0000350;
var result = num.toFixed(5); // result will equal .00003
Upvotes: -1