Variable is a user given name to a memory location where user can store values and can access it using variable name.
user can give any valid variable name to store data.
Variables can store different types of data like integer,character,string, boolean,real values etc.
Syntax
1 | var variableName; |
for all kind of variable we use var keyword then name of variable.
Declaration
1 2 3 4 | var name; var age; var percentage; var grade; |
After declaring variables we can assign value in variable
Assignment
1 2 3 4 | name="Ram"; age=24; percentage=80.50; grade='E'; |
lets consider above variable to display in program
Example
1 |
Java Script Variables
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | <script type="text/javascript"> var name; var age; var percentage; var grade; age=24; name="Ram"; percentage=80.50; grade='E'; document.write("Name is "+name+"<br>"); document.write("Age is "+age+"<br>"); document.write("Percentage is "+percentage+"<br>"); document.write("Grade is "+grade+"<br>"); </script> |
RunInitialization
At the time of declaration variable can also be initialized.
1 2 3 4 | var name="Ram"; var age=24; var percentage=80.50; var grade='O'; |