Javascript Statements

JAVASCRIPT STATEMENTS

A JavaScript statement is a command to the browser. The purpose of the command is to tell the browser what to do.

This JavaScript statement tells the browser to write "Hello Dolly" to the web page: document.write("Hello Dolly");

It is normal to add a semicolon at the end of each executable statement. Most people think this is a good programming practice, and most often you will see this in JavaScript examples on the web.

The semicolon is optional (according to the JavaScript standard), and the browser is supposed to interpret the end of the line as the end of the statement. Because of this you will often see examples without the semicolon at the end.

JavaScript Arithmetic Operators

Arithmetic operators are used to perform arithmetic between variables and/or values. Given that y=5, the table below explains the arithmetic operators:

JAVASCRIPT OPERATORS

= is used to assign values.

+ is used to add values.

The assignment operator = is used to assign values to JavaScript variables. The arithmetic operator + is used to add values together.

y=5;

z=2;

x=y+z;

The value of x, after the execution of the statements above is 7.