Answers for "method checking the uppercase letter in javascript"

check if letter is uppercase javascript

const isUpperCase = (string) => /^[A-Z]*$/.test(string)

how to check if a letter is capital in javascript

// program to convert first letter of a string to uppercase
function capitalizeFirstLetter(str) {

    // converting first letter to uppercase
    const capitalized = str.charAt(0).toUpperCase() + str.slice(1);

    return capitalized;
}

// take input
const string = prompt('Enter a string: ');

const result = capitalizeFirstLetter(string);

console.log(result);