JavaScript BigInt
JavaScript BigInt
- JavaScript BigInt variables are used to store big integer values that are too big to be represented by a normal JavaScript Number.
JavaScript Integer Accuracy
- JavaScript integers are only accurate up to 15 digits.
Sample Code
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Numbers</h1>
<h2>Integer Precision</h2>
<p>Integers are accurate up to 15 digits:</p>
<p id="demo"></p>
<script>
let x = 999999999999999;
let y = 9999999999999999;
document.getElementById("demo").innerHTML = x + "<br>" + y;
</script>
</body>
</html>
Output
JavaScript Numbers
Integer Precision
Integers are accurate up to 15 digits:
999999999999999
10000000000000000- In JavaScript, all numbers are stored in a 64-bit floating-point format (IEEE 754 standard).
- With this standard, large integer cannot be exactly represented and will be rounded.
- Because of this, JavaScript can only safely represent integers.
- Up to 9007199254740991 +(253-1) and Down to -9007199254740991 -(253-1).
- Integer values outside this range lose precision.
How to Create a BigInt
- To create a BigInt, append n to the end of an integer or call BigInt().
Sample Code
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Numbers</h1>
<h2>Integer and BigInt</h2>
<p id="demo"></p>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
let x = 9999999999999999;
let y = BigInt("9999999999999999");
document.getElementById("demo").innerHTML = x + "<br>" + y;
document.getElementById("demo1").innerHTML ="type of x "+typeof x;
document.getElementById("demo2").innerHTML ="type of y "+typeof y;
</script>
</body>
</html>
Output
JavaScript Numbers
Integer and BigInt
10000000000000000
9999999999999999
type of x number
type of y bigintBigInt is the second numeric data type in JavaScript (after Number).
- With BigInt the total number of supported data types in JavaScript is 8.
- String
- Number
- Bigint
- Boolean
- Undefined
- Null
- Symbol
- Object