JavaScript: Check whether a string is lower case or not

JavaScript fundamental (ES6 Syntax): Exercise-197 with Solution

Write a JavaScript program to check whether a string is lower case or not.

• Convert the given string to lower case, using String.prototype.toLowerCase() and compare it to the original.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const isLowerCase = str => str === str.toLowerCase();

console.log(isLowerCase('abc'));
console.log(isLowerCase('a3@$'));
console.log(isLowerCase('Ab4'));

Sample Output:

true
true
false

Pictorial Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-197-1 by w3resource (@w3resource) on CodePen.

Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript program that will return true if the specified value is null, false otherwise.
Next: Write a JavaScript program to check if the given argument is a function.