Question

How to decrement letters in Node.js

Answer 1

function prevChar(char) {
  	return String.fromCharCode(char.charCodeAt(0) - 1);
}


console.log(prevChar('a')); 
console.log(prevChar('b')); 
console.log(prevChar('c')); 
console.log(prevChar('d')); 

console.log(prevChar('A')); 
console.log(prevChar('B')); 
console.log(prevChar('C'));  
console.log(prevChar('D')); 

  
  
  
  
/*
run:
  
`
a
b
c
@
A
B
C
  
*/

 

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