JavaScript » Statements » throw
- Syntax:
- throw (exception)
The throw statement allows the programmer to create an exception. This exception can be a string, integer, Boolean or an object. Coupling the throw statement with the try...catch statement, the programmer can control program flow and generate accurate error messages.
Examples
Code:
try {
if(z == 1)
throw "Error 1"
else if(z == 2)
throw "Error 2"
}
catch(er) {
if(er == "Error 1")
alert("Error 1 Please contact system Administrator")
if(er == "Error 2")
alert("Error 2 Please Reload the page")
}
Explanation:
This example determines the value of variable(z), and generates an error accordingly. This error is then caught by the catch argument and the proper error message is then displayed.
