Question

B. Give JavaScript statements to perform the following tasks.
1. Concatenating two strings: "Click" and "Start".
2. Using single line and multiple line comments.
3. Declaring four variables: length, breadth, height and volume.
4. Display a confirm dialog box with message "Plant more trees”.
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Answer 1

Answer:

At this point in the course we discuss math in JavaScript — how we can use operators and other features to successfully manipulate numbers to do our bidding.

Prerequisites: Basic computer literacy, a basic understanding of HTML and CSS, an understanding of what JavaScript is.

Objective: To gain familiarity with the basics of math in JavaScript.

1.This article discusses the following topics:

Adding Strings

Concatenating Strings

Adding single or double quotes inside a string

Convert string to uppercase

Convert string to lowercase

Length property in JavaScript

Trim function

Replace function

Advantage of using Global Case-Insensitive

Substring function

A real-time example of substring function

2.A comment is an annotation in a source code with the intention to give a programmer a readable explanation of the code. These annotations are ignored by compilers when compiling your code. Comments should explain, at a higher level of abstraction than the code, what you're trying to do.

C# has different syntax for comments. In this guide, we’ll look at single-line and multi-line comments.

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