The null keyword in java programming language is a reserved word that is used to represent no value. Keywords are basically reserved words which have specific meaning relevant to a compiler.

Syntex:  Here is the syntax that displays how to declare and define null values in java programming language.

Note: Here are some points that must be considered while declaring and assigning a value to a variable.

• Assigning a null value to a non-primitive type variable releases the object to which the variable previously referred.

• Primitive data types such as byte, short, int, long, char, float, double, boolean cannot have a null type.