Section 1.1: Capitalizing Strings

Question 1: How do you capitalize a string?

This question may seem straightforward, but it's important to understand the built-in methods we can utilize effectively.

Answer:

You can use the toUpperCase() method in JavaScript to convert all lowercase characters in a string to uppercase. Here's a simple example:

let str = "test";

let newStr = str.toUpperCase();

console.log(newStr); // Output: TEST

Section 1.2: Capitalizing the First Letter

Question 2: How can you capitalize the first letter of a string or sentence?

Understanding how to use the substring() method is key here.

Answer:

To capitalize the first letter, we can combine toUpperCase() with substring():

let str = "hello world"; // Only 'h' needs to be capitalized

let newStr = str[0].toUpperCase() + str.substring(1);

console.log(newStr); // Output: Hello world

Section 1.3: Capitalizing Each Word

Question 3: How can you capitalize the first letter of each word in a sentence?

Answer:

We can utilize the split(), map(), and join() methods:

const str = "hello friends welcome to day 5";

const words = str.split(" ");

const capitalizedWords = words.map(word => word[0].toUpperCase() + word.substring(1)).join(' ');

console.log(capitalizedWords); // Output: Hello Friends Welcome To Day 5

Now, you can also experiment with a for loop to achieve similar results!

Section 1.4: Reversing Strings

Question 4: How do you reverse a string?

A common interview question, reversing a string can be accomplished using the following approach:

Answer:

We can split the string into an array, reverse it, and then join it back together:

function reverseString(str) {

return str.split("").reverse().join("");

}

console.log(reverseString("hello")); // Output: olleh

Section 1.5: Reversing Words

Question 5: How do you reverse the order of words in a string?

Answer:

To reverse the order of words, we can use:

function reverseWords(str) {

return str.split(' ').reverse().join(' ');

}

console.log(reverseWords('hello world')); // Output: world hello

As we delve into string manipulation, remember that there's a vast landscape of possibilities. Continue exploring more examples over the next few days!

To further your understanding, check out these helpful videos:

The first video titled "5 JavaScript Concepts Every Beginner Developer Should Know" provides essential insights for those starting out.

The second video, "JavaScript Mastery Complete Course | JavaScript Tutorial For Beginner to Advanced," offers a comprehensive overview of JavaScript concepts.

Remember, sharing knowledge enriches us all. Stay kind and respectful in your learning journey!