Open In App
Related Articles

JavaScript Statements

Improve
Improve
Improve
Like Article
Like
Save Article
Save
Report issue
Report

The programming instructions written in a program in a programming language are known as statements. The order of execution of Statements is the same as they are written.

Semicolons

  • Semicolons separate JavaScript statements.
  • A semicolon marks the end of a statement in JavaScript. 

Example: In this example, we have shown the use of Semicolons.

Javascript

let a, b, c;
a = 2;
b = 3;
c = a + b;
console.log("The value of c is " + c + ".");

                    

Output
The value of c is 5.

Multiple statements on one line are allowed if they are separated with a semicolon.

a=2;b=3;z=a+b;

Code Blocks

JavaScript statements can be grouped together inside curly brackets. Such groups are known as code blocks. The purpose of grouping is to define statements to be executed together. 

Example: In this example, we have shown Code Blocks. 

Javascript

function myFunction() {
    console.log("Hello");
    console.log("How are you?");
}
myFunction()

                    

Output
Hello
How are you?

White Space

JavaScript ignores multiple white spaces.

Example: In this example, we have shown that JavaScript ignores white spaces.

Javascript

console.log(10 * 2);
console.log(10 * 2);

                    

Output
20
20

Both the result will be the same

Line Length and Line Breaks

JavaScript code’s preferred line length by most programmers is up to 80 characters. The best place to break a code line in JavaScript, if it doesn’t fit, is after an operator

Example: In this example, we have shown Line Length and Line Breaks

document.getElementById("geek1").innerHTML =
"Hello Geek!";

Keywords

Keywords are reserved words and cannot be used as a variable name. A JavaScript keyword tells about what kind of operation it will perform. 

Some commonly used keywords are:

  • break and continue: break keyword is used to terminate a loop and continue is used to skip a particular iteration in a loop and move to the next iteration.
  • do…. while: In this, the statements written within the do block are executed till the condition in while is true.
  • for: It helps in executing a block of statements till the condition is true.
  • function: This keyword is used to declare a function.
  • return: This keyword is used to exit a function.
  • switch: This helps in executing a block of codes depending on different cases.
  • var, let, and const: These keywords are used to declare a variable in js. 


Last Updated : 18 Dec, 2023
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads