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JavaScript: Capitalize the first letter of each word of a given string

JavaScript Basic: Exercise-50 with Solution

Write a JavaScript program to capitalize the first letter of each word of a given string.

Pictorial Presentation:

JavaScript: Capitalize the first letter of each word of a given string

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to capitalize the first letter of each word of a given string.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function capital_letter(str) 
{
    str = str.split(" ");

    for (var i = 0, x = str.length; i < x; i++) {
        str[i] = str[i][0].toUpperCase() + str[i].substr(1);
    }

    return str.join(" ");
}

console.log(capital_letter("Write a JavaScript program to capitalize the first letter of each word of a given string."));

Sample Output:

Write A JavaScript Program To Capitalize The First Letter Of Each Word Of A Given String.

Flowchart:

Flowchart: JavaScript - Capitalize the first letter of each word of a given string

ES6 Version:

function capital_letter(str) 
{
    str = str.split(" ");

    for (let i = 0, x = str.length; i < x; i++) {
        str[i] = str[i][0].toUpperCase() + str[i].substr(1);
    }

    return str.join(" ");
}

console.log(capital_letter("Write a JavaScript program to capitalize the first letter of each word of a given string."));

Live Demo:

See the Pen JavaScript - capitalize the first letter of each word of a given string - basic-ex-50 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript program to convert a given number to hours and minutes.

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JavaScript: Tips of the Day

Returns the sum of the powers of all the numbers from start to end (both inclusive)

Example:

const sumPower = (end, power = 2, start = 1) =>
  Array(end + 1 - start)
    .fill(0)
    .map((x, i) => (i + start) ** power)
    .reduce((a, b) => a + b, 0);
console.log(sumPower(10)); // 385
console.log(sumPower(10, 3)); // 3025
console.log(sumPower(10, 3, 5)); // 2925

Output:

385
3025
2925