JavaScript Number toFixed() method

JavaScript: number toFixed() function; Through this tutorial, i am going to show you how to use the number method called toFixed with the help of examples.

JavaScript Number toFixed() method

The toFixed() method in JavaScript is used to format a number using fixed-point notation. It can be used to format a number with a specific number of digits to the right of the decimal. The toFixed() method is used with a number as shown in above syntax using the ‘. ‘ operator.

Syntax of JavaScript Number toFixed() method

number.toFixed(n);

Here,

  • The first thing is n is an optional parameter in toFixed function.
  • The second thing is, n is a number of digits after the decimal place to display in the result.

Example 1 – JavaScript Number toFixed() method

Using the javascript number toFixed() method, you can format numbers in one decimal point and more decimal points or without decimal; as follows:

 var number = 111.123456;

 number.toFixed();
 number.toFixed(1);
 number.toFixed(2);

 //Output
 111
 111.1
 111.12

Example 2 – Javascript toFixed With and Without Rounding

Using the toFixed() method, you can round a number with or without using .toFixed function; as follows:

<!DOCTYPE html>
<html>
   <head>
      <title>Javascript tofixed With and Wthout Rounding Example</title>
   </head>
<body>
<button onclick="calFucntion()">Click & See Result</button>
<br><br>
<b>With Round :-</b> <p id="withRound"></p>
<b>Without Round :-</b> <p id="roundValue"></p>
<script>
  function calFucntion() {
    var num = 5285.8556545;
    var withRound = num.toFixed(2);
    var with2Decimals = num.toString().match(/^-?\d+(?:\.\d{0,2})?/)[0];
    document.getElementById("withRound").innerHTML = withRound;
    document.getElementById("roundValue").innerHTML = with2Decimals;
}
</script>
</body>
</html>

Example 3 – javascript tofixed method

var num = 12345.6789;
num.toFixed();       // Returns '12346': note rounding, no fractional part
num.toFixed(1);      // Returns '12345.7': note rounding
num.toFixed(6);      // Returns '12345.678900': note added zeros
(1.23e+20).toFixed(2);  // Returns '123000000000000000000.00'
(1.23e-10).toFixed(2);  // Returns '0.00'
2.34.toFixed(1);        // Returns '2.3'
2.35.toFixed(1);        // Returns '2.4'. Note it rounds up
2.55.toFixed(1);        // Returns '2.5'. Note it rounds down - see warning above
-2.34.toFixed(1);       // Returns -2.3 (due to operator precedence, negative number literals don't return a string...)
(-2.34).toFixed(1);     // Returns '-2.3'

Conclusion

In this tutorial, you have learned how to use javascript .tofixed function with examples

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