Write a function that takes a string as input and returns the string with the first letter of each word capitalized. For example, if the input string is “the quick brown fox”, the function should return “The Quick Brown Fox”.
function capitalizeWords(str) {
// Split the string into an array of words
const words = str.split(" ");
// Initialize an empty array to store the capitalized words
const capitalized = [];
// Loop through the array of words and capitalize the first letter of each one
for (let i = 0; i < words.length; i++) {
const word = words[i];
const capitalizedWord = word.charAt(0).toUpperCase() + word.slice(1);
capitalized.push(capitalizedWord);
}
// Join the array of capitalized words back into a single string
const result = capitalized.join(" ");
// Return the string with capitalized words
return result;
}
The function takes a single argument, str, which is the string to capitalize. Here’s what the function does:
split method with a space as the delimiter.capitalized to store the capitalized words.for loop. For each word in the array, it capitalizes the first letter of the word using the toUpperCase method and the slice method to extract the rest of the word. It then pushes the capitalized word to the capitalized array.join the array of capitalized words back into a single string, separated by spaces.Here’s an example usage of the function:
console.log(capitalizeWords("the quick brown fox")); // 'The Quick Brown Fox'
console.log(capitalizeWords("hello world")); // 'Hello World'
In this example, the function correctly capitalizes the first letter of each word in the input strings and returns the capitalized strings “The Quick Brown Fox” and “Hello World”, respectively.