Checking Null Values in JavaScript

Checking for the null values before executing the code limits a number of errors.
To check the Null values in JavaScript, do the following:
1.First declare the variable. Type the below lines into your JavaScript code:
var myVa = null;
This will allocate memory and will define the variable
2. Evaluate if the variable is null.
if (myVa== null) {
}
This will give a way to execute the code if myVa is null.
3. Evaluate if the value is not null. You may want to run a specific code when the value is not null. The "!" makes the compiler to run the statements only if you get a false result.

if (! MyVa) {
}