check if letter is uppercase javascript
const isUpperCase = (string) => /^[A-Z]*$/.test(string)check if letter is uppercase javascript
const isUpperCase = (string) => /^[A-Z]*$/.test(string)js to uppercase
var string = "A string";
var upperCase = string.toUpperCase();
console.log(upperCase); // -> A STRING
var lowerCase = string.toLowerCase();
console.log(lowerCase); // -> a stringCopyright © 2021 Codeinu
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