In this article with the help of javascript we are generating the alpha-numeric string of specific length using javascript, here are some common method
Approach 1:
- Creates a function that takes 2 arguments one is the length of the string that we want to generate and another is the characters that we want to be present in the string.
- Declare new variable ans = ‘ ‘.
- Traverse the string in reverse order using for loop.
- Use JavaScript Math.random() method to generate the random index and multiple with the length of the string.
- Use JavaScript Math.floor( ) to round off it and add it into the ans.
Example 1: This example uses the Math.random() method to generate the random index and then appends the character from the string we passed.
Javascript
function randomStr(len, arr) { let ans = ''; for (let i = len; i > 0; i--) { ans += arr[(Math.floor(Math.random() * arr.length))]; } console.log(ans);}randomStr(20, '12345abcde'); |
Output
eecedee32d5245ba5ee3
Approach 2:
- First, generate a random number using Math.random() method.
- Use JavaScript toString(36) to convert it into base 36 (26 char + 0 to 9) which is also an alpha-numeric string.
- Use JavaScript String.slice() method to get the part of the string which is started from position 2.
Example 2: This example first generates a random number(0-1) and then converts it to base 36 which is also an alpha-numeric string by using toString(36)() method.
Javascript
function GFG_Fun() { console.log( Math.random().toString(36).slice(2));}GFG_Fun() |
Output
vv1lcnuwtm
