How to increment a letter using javascript?

Question

Hi, is there any way to increment a letter using javascript?
for example if the letter "A" is given as input we should get the output as "B".

Answer 1

Hi Adnan

Use String.charCodeAt() to get character codes to manipulate. Once you have code you can do maths on it.
Use String.fromCharCode() to convert back.

You can combine them likeso

String.fromCharCode("A".charCodeAt(0) + 1)
//B

You need to be careful for non Unicode characters, where you can use String.fromCodePoint()

sidenote: Strings are immutable, so you need to convert them to arrays in order to make changes to them, and then convert back to string.

Answer 2

Disclaimer
I dont javascript

But i can suggest a few ways.
1. You can transfer a string to unicode ex)a= U+0061 , U+0062=b
2. Make a alphabet array and get where the alphabet is located ex)a=1 increment by 1 ->2 get 2nd of alphabet array 2->b
3. Make a decryption array
So all elements aline by 1increased alphabet
ex) a,b,c,d...->b,c,d,e...
Input a-> in array decrypt ->b

Answer 3

thank you mike, syul