Z:gnu-www-ja-shouldbefree--68c7f7-Programmers normally work with/en

Programmers normally work with the &ldquo;source code&rdquo; for a program, which is written in a programming language such as Fortran or C. It uses names to designate the data being used and the parts of the program, and it represents operations with symbols such as &lsquo;+&rsquo; for addition and &lsquo;-&rsquo; for subtraction. It is designed to help programmers read and change programs. Here is an example; a program to calculate the distance between two points in a plane: