// APS101, Winter 2009: Lecture 2 (Jan. 12)
//
// Try these in DrJava! Remember: practice is the key to learning how to program. 
8 + 3
7 + 2
3.0 + 5.6
9 / 2
5 / 2.0
2.0 / 3
// Java has different types.
// A type is a set of values and a set of operations on
// those values.
// This is a Java comment, because the line starts with //
// Java ignores everything after //
/* this is also a comment */ 5.0
// 9 and 2 are type int, so the expression "9 / 2" gives
// us an int result.
9.0 / 2.0
// 9.0 and 2.0 are of type double, so the expression
// evaluates to give a double value (4.5)
9 / 2.0
// operations on ints and doubles: + - / *
Integer.MAX_VALUE
Integer.MIN_VALUE
Double.MIN_VALUE
Double.MAX_VALUE
1.0 / 3
// In Java, real numbers are called floating-point numbers.
// Floating-point numbers are approximations to real numbers.
1.0f / 3 
// Two floating-point types: float and double
// We'll usually use type double.
// Double has twice as many significant digits as float.
Float.MAX_VALUE
Float.MIN_VALUE
// Three more types: short, long, byte
// These are all able to store integer values, but have
// different ranges than type int.
// You can use different types for different applications,
// in order to ensure efficiency.
Long.MIN_VALUE
Long.MAX_VALUE
Short.MIN_VALUE
Short.MAX_VALUE
Byte.MIN_VALUE // notice that type byte has the smallest range
Byte.MAX_VALUE