How to use the parseInt() method In Javascript
The parseInt() method can be used to convert a numeric string into a number by passing it as an arguement to it. It will always return an integer either you pass a floating point string or integer string.
Syntax:
parseInt(stringVariable);
Example: The below code uses the parseInt() method to convert a string into a number.
const str1 = "233";
const str2 = "23.33"
console.log("Before Conversion: ");
console.log("str1: ", str1, ", Type: ", typeof str1);
console.log("str2: ", str2, ", Type: ", typeof str2);
console.log("After Conversion: ");
console.log("str1: ", parseInt(str1), ", Type: ", typeof parseInt(str1));
console.log("str2: ", parseInt(str2), ", Type: ", typeof parseInt(str2));
Output
Before Conversion: str1: 233 , Type: string str2: 23.33 , Type: string After Conversion: str1: 233 , Type: number str2: 23 , Type: number
Convert a String to Number in JavaScript
Converting strings to numbers in JavaScript is a fundamental operation, crucial for various tasks like handling user inputs or data processing. By converting strings to numeric values, JavaScript enables developers to perform mathematical operations and comparisons accurately, enhancing the versatility and functionality of their applications.
Table of Content
- Using the ‘+’ operator
- Using the Number() constructor
- Using the parseInt() method
- Using the parseFloat() method
- Using the Math.floor() method
- Using the Math.ceil() method
- Using the Math.round() method
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