Primitive is the simplest type of programming language item. It may also refer to the smallest processing unit accessible by a programmer.
In a high-level programming language, discrete statements and primitive data types perform a single operation or signify a single data item. Primitives are used to create more complex pieces of code.
Primitive types are also known as built-in types or basic types.
Techopedia explains Primitive
Primitive types are basic programming language building blocks. Primitive types may or may not have a one-to-one relationship with computer memory objects and are the fastest existing language constructs. A programmer combines primitives to create more complex operations, such as functions, procedures and methods.