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JavaScript: parseFloat() function

Description

The parseFloat is used to get a floating value from a string. parseFloat is a top-level function and is not associated with any object.

Syntax

parseFloat(string)

Parameters

string: Required. A string that represents the value to test.

Example of parseFloat() function

The following example demonstrate how to use parseFloat() function.

JavaScript Code:

console.log('"21" -> '+parseFloat("21"));
console.log('"21.42" -> '+parseFloat("21.42"));
console.log('"100 234 54" -> '+parseFloat("100 234 54"));
console.log('"89 Math" ->'+parseFloat("89 Math"));
console.log('"Math 89" ->'+parseFloat("Math 89"));

View the example in the browser

Live demo:

See the Pen parsefloat-function-1 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04