JavaScript BigInt asIntN() Method

Last Updated : 16 May, 2023

The BigInt.asIntN() method is an inbuilt method in JavaScript that is used to wrap a BigInt value to a signed integer between -2^width-1 and 2^width-1-1.

Syntax:

BigInt.asIntN(width, bigint);;

Parameters: This function accepts two parameters as mentioned above and described below:

width: This parameter holds the number of bits available for the integer size.
bigint: This parameter holds the integer to clamp to fit into the supplied bits.

Return value: This method returns the value of bigint modulo 2^width as a signed integer.

Below example illustrate the BigInt.asIntN() method in JavaScript:

Example 1: In this example, we will see the use of the BigInt.asIntN() method in JavaScript.

javascript

<script> 
    let maxlimit = 2n ** (64n - 1n) - 1n; 
      
    function GFG(num) { 
      (num > maxlimit) ? 
        console.log("Number exceed the limit of"+ 
                      " signed 64-bit integer!") : 
        console.log(BigInt.asIntN(64, num)); 
    } 
      
    GFG(2n ** 16n); 
    GFG(2n ** 32n); 
    GFG(2n ** 64n);   
</script>

Output:

65536n
4294967296n
"Number exceed the limit of signed 64-bit integer!"

Example 2: In this example, we will see the use of the BigInt.asIntN() method in JavaScript.

javascript

<script> 
    const max = 2n ** (64n - 1n) - 1n; 
      
    console.log(BigInt.asIntN(64, max)); 
    console.log(BigInt.asIntN(64, max + 1n)); 
    console.log(BigInt.asIntN(32, max));   
</script>

Output:

9223372036854775807n
-9223372036854775808n
-1n

We have a complete list of Javascript BigInt methods, to check those please go through the Javascript BigInt Complete Reference article.

Supported Browsers: The browsers supported by BigInt.asIntN() method are listed below:

Google Chrome 67 and above
Firefox 68 and above
Opera 54 and above
Safari 14 and above
Edge 79 and above

JavaScript BigInt asUintN() Method

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