What statement best describes a variable and its primary purpose?

A variable is a word that has a special meaning to the compiler.

A variable is a structured, general$-$purpose language designed primarily for teaching programming.

A variable is a named storage location in the computer's memory used for holding a piece of intormation.

A variable is a collection of eight bits.

A variable is a "line" of code in the body of a program, that may change.