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

Last update on May 30 2022 10:07:51 (UTC/GMT +8 hours)

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:

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.

JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());

Ref: https://bit.ly/2BXbp04