Node.js util.types.isFloat64Array() Method

The util.types.isFloat64Array() method is an inbuilt application programming interface of the util module which is used to check for Float64Array type in the node.js. 

Syntax:

util.types.isFloat64Array( value )

Parameters: This method accepts a single parameter as mentioned above and described below:

• value: It is a required parameter that holds any data type.

Return Value: It returns a boolean value, TRUE if the value is a Float64Array, FALSE otherwise.

Example 1: In the below example illustrates the use of util.types.isFloat64Array() method in Node.js: 

javascript

// Node.js program to demonstrate the
// util.types.isFloat64Array() Method

// Allocating util module
const util = require('util');

// Passed as parameter to the
// util.types.isFloat64Array() method
let v1 = new BigInt64Array();
let v2 = new BigUint64Array();
let v3 = new Float32Array();
let v4 = new ArrayBuffer();
let v5 = new Float64Array();

// Printing the returned value from
// util.types.isFloat64Array() method
console.log(util.types.isFloat64Array(v1));
console.log(util.types.isFloat64Array(v2));
console.log(util.types.isFloat64Array(v3));
console.log(util.types.isFloat64Array(v4));
console.log(util.types.isFloat64Array(v5));

Output:

false
false
false
false
true

Example 2: In this example, we will illustrate the use of util.types.isFloat64Array() method in Node.js: 

javascript

// Node.js program to demonstrate the
// util.types.isFloat64Array() Method

// Allocating util module
const util = require('util');

// To be passed as parameter of
// util.types.isFloat64Array() method
let v1 = new Float64Array();
let v2 = new Float64Array();

// Calling util.types.isFloat64Array() method
if (util.types.isFloat64Array(v1))
    console.log("The passed value is a Float64Array.");
else
    console.log("The passed value is not a Float64Array");

if (util.types.isFloat64Array(v2))
    console.log("The passed value is a Float64Array.");
else
    console.log("The passed value is not a Float64Array");

Output:

The passed value is not a Float64Array
The passed value is a Float64Array.

Note: The above program will compile and run by using the node filename.js command. 

Reference: https://nodejs.org/api/util.html#util_util_types_isfloat64array_value