Page 316 - Web Applications (803) Class 11
P. 316

When you click on the “OK” button, with the message “this page says”. Then a new window opens, as shown below:













                                   Do You Know?


                                   In  JavaScript,  the  non-zero  value  is  interpreted  as  true  and  0  is
                                   interpreted as false.


              The if…else Statement

              The if…else statement checks for a condition. If the condition evaluates to True, the indented block following the if
              statement is executed, otherwise the indented block after the else statement is executed. The syntax of the if… else
              statement is given below:

                 if (condition)
                 {
                 // When the condition is true then block of code to be executed.
                 }
                 else
                 {
                 // When ’if’ statement condition is false then block of code to be executed.
                 }
              Flow diagram:

                                                       Start







                                                    if condition
                                                                     False


                                                    True


                                                    Statements         else statements



                                                       Stop

              Example:

                 <!DOCTYPE HTML>
                 <HTML>
                 <HEAD>
                 <TITLE> if-else statement </TITLE>

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