Answers for "js remove leading zeros"

javascript remove leading zeros from string

use a regular expression like this  

var strNumber = "0049";  
console.log(typeof strNumber); //string  
  
var number  = strNumber.replace(/^0+/, '');

js remove zeros after decimal

(+n).toFixed(2).replace(/(\.0+|0+)$/, '')


// 0 => 0
// 0.1234 => 0.12
// 0.1001 => 0.1

// 1 => 1
// 1.1234 => 1.12
// 1.1001 => 1.1

// 100 => 100
// 100.1234 => 100.12
// 100.1001 => 100.1

remove trailing zeros javascript

var n = 6.96900
var noTrailingZeroes = n.toString()
console.log(noTrailingZeroes) // -> 6.969

remove leading characters in javascript

1. Using substring()
The substring() method returns the part of the string between the specified indexes, or to the end of the string.

let str = 'Hello';
 
str = str.substring(1);
console.log(str);
 
/*
    Output: ello
*/
 
The solution can be easily extended to remove first n characters from the string.


let str = 'Hello';
let n = 3;
 
str = str.substring(n);
console.log(str);
 
/*
    Output: lo
*/
 
___________________________________________________________________________
2. Using slice()
The slice() method extracts the text from a string and returns a new string.

let str = 'Hello';
 
str = str.slice(1);
console.log(str);
 
/*
    Output: ello
*/
 
This can be easily extended to remove first n characters from the string.


let str = 'Hello';
let n = 3;
 
str = str.slice(n);
console.log(str);
 
/*
    Output: lo
*/
 
__________________________________________________________________________
3. Using substr()
The substr() method returns a portion of the string, starting at the specified index and extending for a given number of characters or till the end of the string.


let str = 'Hello';
 
str = str.substr(1);
console.log(str);
 
/*
    Output: ello
*/
 
Note that substr() might get deprecated in future and should be avoided.