Page 49 - 2611_SmartGPT Pro V(5.0) C-8
P. 49

Step  5     Click on the OK button in the message box.
                 The web browser displays the web page.



















                                          Which attribute is used to embed external JavaScript into HTML5 web
                         uiz   Bee        page?

                                          _________________________________________________________________







                           STATEMENTS IN JAVASCRIPT

                 Commands and instructions given to the JavaScript interpreter to take some actions are called
                 statements and a collection of statements is called a script or a program. Within almost every
                 browser resides the JavaScript engine, which interprets and executes JavaScript code. We use
                 the semicolon to terminate a statement; however, if the statements are written in separate lines,
                 then the semicolon can be omitted.

                 JavaScript statements consist of keywords, variables, operators, expressions and comments.
                 Let us learn about them in detail.

                 KEYWORDS
                 A keyword is a reserved word that has a special meaning for the JavaScript interpreter. Some of

                 the keywords of JavaScript are:
                                         var,  switch,  let,  for, const,  function,  if,  return, etc.

                 VARIABLES
                 A variable is the name of storage location. It stores a value that can be modified later. JavaScript
                 is a loosely typed language which means it does not require a data type to be declared before

                 using it. The syntax to declare a variable in JavaScript is:
                 var <variable name> = <value>;
                 where var is a keyword, <variable name> is a valid name for the variable and <value> is the value
                 that you want to assign to the variable.
                 For example:

                 var age = 16;
                 var name = "A"


                                                                                      Dynamic Web Pages in HTML5  47
   44   45   46   47   48   49   50   51   52   53   54