5

CHAPTER

we used System.infor input and System.outfor out-
put. With these classes, all input is from the keyboard and output is to the
screen. In this chapter, we look at input that can be prepared ahead of time
on a file and output that can be written to a file for later use. We also ex-
amine another of Java’s control structures, the loop. In Chapter 4, we saw
how the flow of control in an application can be altered to select among
different actions with the ifstatement. In this chapter, we work with a
statement that allows us to repeat actions: the whilestatement.

In Chapters 2, 3, and 4,

1956-57

The RAMAC,

random-access

method of

accounting and

control, is

introduced by IBM

for hard disk data

storage

1957

The concept of

artificial intelligence

is developed at

Dartmouth College

1957

John Backus debuts

the first Fortran

compiler

1957

John McCarthy

founds MIT’s

Artificial

Intelligence

Department

1957

The first computer-

controlled launch of

the Atlas missile

takes place

1957

Russia launches

Sputnik I into orbit