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 test letter lowercase
if (character == character.toLowerCase())
{
// The character is lowercase
}
else
{
// The character is uppercase
}
//The problem with this answer is,
//that some characters like numbers or punctuation
//also return true when checked for lowercase/uppercase.
// this is the solution for it:
function isLowerCase(str)
{
return str == str.toLowerCase() && str != str.toUpperCase();
}check if letter is uppercase javascript
var strings = 'this iS a TeSt 523 Now!';
var i=0;
var character='';
while (i <= strings.length){
character = strings.charAt(i);
if (!isNaN(character * 1)){
alert('character is numeric');
}else{
if (character == character.toUpperCase()) {
alert ('upper case true');
}
if (character == character.toLowerCase()){
alert ('lower case true');
}
}
i++;
}Copyright © 2021 Codeinu
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