Question

How to count uppercase, lowercase, special characters, and numeric values using RegEx in TypeScript

Answer 1

type CharacterCounts = {
    uppercase: number;
    lowercase: number;
    digits: number;
    special: number;
};

function countCharacters(text: string): CharacterCounts {
    const uppercase: number = (text.match(/[A-Z]/g) || []).length;
    const lowercase: number = (text.match(/[a-z]/g) || []).length;
    const digits: number    = (text.match(/\d/g) || []).length;
    const special: number   = (text.match(/[^A-Za-z0-9]/g) || []).length;

    return { uppercase, lowercase, digits, special };
}

const s = "Programming&AI@2026!";

const { uppercase, lowercase, digits, special } = countCharacters(s);

console.log("Uppercase:", uppercase);
console.log("Lowercase:", lowercase);
console.log("Digits:", digits);
console.log("Special characters:", special);

  
  
/*
run:
  
"Uppercase:",  3 
"Lowercase:",  10 
"Digits:",  4 
"Special characters:",  3 
  
*/

 

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