How to cut off decimals in javascript

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7 Answers

decimalsjavascript
90%

So, multiply/divide approach reduces the error, but doesn’t remove it totally,,Here the underscore _ plays the role of the “syntactic sugar”, it makes the number more readable

Example_snippet/controller/utility/_decimals.js/ let billion = 1000000000;. . .
let billion = 1000000000;
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88%

Example_snippet/controller/utility/_decimals.js/ var twoPlacedFloat = parseFloa. . .
var twoPlacedFloat = parseFloat(yourString).toFixed(2)
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72%

Here is simple but working function to truncate number upto 2 decimal places,,I am trying to truncate decimal numbers to decimal places

Example_snippet/controller/utility/_decimals.js/ truncateDecimals = function (n. . .
truncateDecimals = function(number) {
   return Math[number < 0 ? 'ceil' : 'floor'](number);
};

// Applied to Dogbert's answer:
var a = 5.467;
var truncated = truncateDecimals(a * 100) / 100; // = 5.46
Step 2 continued with truncateDecimals = function (n. . .
truncateDecimals = function(number, digits) {
   var multiplier = Math.pow(10, digits),
      adjustedNum = number * multiplier,
      truncatedNum = Math[adjustedNum < 0 ? 'ceil' : 'floor'](adjustedNum);

   return truncatedNum / multiplier;
};

// Usage:
var a = 5.467;
var truncated = truncateDecimals(a, 2); // = 5.46

// Negative digits:
var b = 4235.24;
var truncated = truncateDecimals(b, -2); // = 4200
Step 3 continued with var multiplier = Math.pow(10, . . .
var multiplier = Math.pow(10, Math.abs(digits)),
Step 4 continued with function truncateDecimals (num. . .
function truncateDecimals(num, digits) {
   var numS = num.toString(),
      decPos = numS.indexOf('.'),
      substrLength = decPos == -1 ? numS.length : 1 + decPos + digits,
      trimmedResult = numS.substr(0, substrLength),
      finalResult = isNaN(trimmedResult) ? 0 : trimmedResult;

   return parseFloat(finalResult);
}
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65%

The Math,trunc() method is used to return the integer part of a floating-point number by removing the fractional digits

Example_snippet/controller/utility/_decimals.js/ 15. . .
15
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75%

Unlike the other three Math methods: Math,floor(), Math

Example_snippet/controller/utility/_decimals.js/ Math.trunc(x) . . .
Math.trunc(x)
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40%

Retrieving the decimal part only of a number in JavaScript,To remove the decimal part from a number, use the JavaScript Math,trunc() method

Example_snippet/controller/utility/_javascript.js/ <!DOCTYPE html> <html>    <bod. . .
<!DOCTYPE html>
<html>
   

<body>
         <p>Value:</p>
         <script>
      var myFloat = 4.5;
      var myTrunc = Math.trunc(myFloat);
      document.write(myTrunc + " ");
   </script>
      </body>

</html>
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22%

toFixed() to remove a certain amount of decimals,,parseInt() to parse to the nearest whole number

Example_snippet/controller/utility/_javascript.js/ const decimal = 5.67567;. . .
const decimal = 5.67567;
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