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.
Previous: JavaScript: parseInt() function
Next: JavaScript: NaN
Test your Programming skills with w3resource's quiz.
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
- New Content published on w3resource:
- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework