Also referred to as client code, this is a part of a computer program that makes use of another part of a computer program. Most programming languages provide the abstraction of a procedure or function, which can take arguments, and return a value. An example might be

int mult(int x, int y) {return x*y;}

The calling code (somewhere else in the program) might look like

int a = 2;
int b = 3;
int prod = mult(a,b);

See also:
Procedure-oriented programming
Object-oriented programming

Log in or register to write something here or to contact authors.