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How to Convert a Float Number to a Whole Number in JavaScript
Topic: JavaScript / jQueryPrev|Next
Answer: Use the JavaScript trunc() Method
You can use the trunc() method to get the integer part of a number by removing any fractional digits. This method was added in ECMAScript 6 and supported by the latest browsers such as Chrome, Firefox, Safari, Opera, and Edge browsers. Not supported in Internet Explorer.
Alternatively, you can also try other methods like floor(), ceil() and round() to round a number. Let's take a look at the following example to understand how it works:
Example
Try this code »<script>
console.log(Math.trunc(3.5)); // Prints: 3
console.log(Math.trunc(-5.7)); // Prints: -5
console.log(Math.trunc(0.123)); // Prints: 0
console.log(Math.trunc(-1.123)); // Prints: -1
console.log(Math.ceil(3.5)); // Prints: 4
console.log(Math.ceil(-5.7)); // Prints: -5
console.log(Math.ceil(9.99)); // Prints: 10
console.log(Math.ceil(-9.99)); // Prints: -9
console.log(Math.floor(3.5)); // Prints: 3
console.log(Math.floor(-5.7)); // Prints: -6
console.log(Math.floor(9.99)); // Prints: 9
console.log(Math.floor(-9.99)); // Prints: -10
console.log(Math.round(3.5)); // Prints: 4
console.log(Math.round(-5.7)); // Prints: -6
console.log(Math.round(7.25)); // Prints: 7
console.log(Math.round(4.49)); // Prints: 4
</script>Related FAQ
Here are some more FAQ related to this topic:
- How to check whether a value is numeric or not in jQuery
- How to determine if variable is undefined or null in JavaScript
- How to check if a variable exists or defined in JavaScript
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