if – else block: Else block can be used to execute an optional logic if the given condition has failed.
Program to check the person is eligible for Vote or Not:
| <head> <script> function canVote(){ var age = paseInt(document.getElementById(“age”).value); if(age>=18) document.write(“you can vote”); else document.write(“wait ” + (18-age) + ” years to vote”); } </script> </head> <body> Enter your Age : <input type=”text” id=”age”/><br/> <button onclick=”canVote()”> can vote </button> </body> |
Program to check the number is Even or Not:
| <head> <script> function isEven(){ var num = parseInt(document.getElementById(“num”).value); if(num%2==0) document.write(num + ” is even”); else document.write(num + ” is not even”); } </script> </head> <body> Enter number : <input type=”text” id=”num”/><br/> <button onclick=”isEven()”> Even or Not </button> </body> </html> |