Question

How to count the lowercase letters in a string with JavaScript

Answer 1

const s = "JavaScript";

let lower = 0;

for (let i = 0; i < s.length; i++) {
    if (s[i] >= 'a' && s[i] <= 'z') {
        lower++;
    }
}

console.log(lower);

 
/*
run:
 
8
 
*/

 

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Answer 2

const s = "JavaScript";

let lower = 0;

for (let i = 0; i < s.length; i++) {
   if (s[i] == s[i].toLowerCase()) {
        lower++;
    }
}

console.log(lower);

 
/*
run:
 
8
 
*/

 

Cleaner teeth, healthier you!
Get The Secret to a Bright and Healthy Smile