The function of structural components of programs - EdexcelIteration

Iteration is the third programming construct. There are times when a program needs to repeat certain steps until told otherwise, or until a condition has been met. This process is known as iteration.

Iteration is also often referred to as looping, since the program ‘loops’ back to an earlier line of code. Sections of code that are iterated are called loops.

Iteration enables programmers to greatly simplify a program. Instead of writing out the same lines of code again and again, a programmer can write a section of code once, and ask the program to execute it again and again until it is no longer needed.

This program prints a message out six times:

SEND ‘Coding is cool’ TO DISPLAY SEND ‘Coding is cool’ TO DISPLAY SEND ‘Coding is cool’ TO DISPLAY SEND ‘Coding is cool’ TO DISPLAY SEND ‘Coding is cool’ TO DISPLAY SEND ‘Coding is cool’ TO DISPLAY