Question

How to decrement letters in JavaScript

Answer 1

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

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

console.log(prevChar('A')); 
console.log(prevChar('B')); 
  
  
  
  
  
/*
run:
  
"`"
"a"
"@"
"A"
  
*/

 

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