Page 297 - Web Applications (803) Class 11
P. 297

Example: To multiply two numbers using multiplication assignment operator.
                   <HTML>
                   <BODY>
                   <SCRIPT>
                   var x = 10;
                   x *= 5;
                   document.writeln("output "+ x);
                   </SCRIPT>
                   </BODY>
                   </HTML>
                 Following is the output of the above code:
















                                                 Lab Assignment ‘n Activity                           Interdisciplinary



                   Create JavaScript programs to calculate the following and display the result with appropriate messages:
                   1.  Area and perimeter of a rectangular lawn
                   2.  Simple Interest
                   Try the following code snippets and check the output:
                         document.write( “WELCOME” + “TO” + “ALL”)
                         document.write (10+12+ “234”)


                 Comparison Operators

                 To determine equality or difference between variables or values, comparison operators are utilised in logical statements.
                 The comparison operators are explained in the table below, assuming x = 8.

                  Operator       Name                          Description                     Example        Output
                     ==      equal to        It is used to compare the value of a variable against   x==7       false
                                             the  value  of  other  variable  or  directly  with  some   x==8   true
                                             other value.
                     !=      not equal       tIt is used to check if two operands being evaluated   x!=8        false
                                             are not equal. Then this gives the value true.
                      >      greater than    It is used to check whether any expression generates   x>8         false
                                             a value greater than other expressions; if so, then
                                             the value would evaluate to true; else false. ’






                                                                      Introduction to Dynamic Websites Using JavaScript  295
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