Data Types - Java for Beginners - page 10

This is for real numbers used for calculation such as square roots, sine and cosine. These
are of two types.
Float- Width in bits is 32 and range is from 1.4e-045 to 3.4e + 038. Float is used as a
variable type for the fractional component, but specifies single precision. It can be used in
representing dollars and cents.
Declaration
Float hightemp;
Double- Width in bits is 64 and range is from 4.9e-324 to 1.8e + 308.it is used and is optim-
ized in such a way that I can be used for high speed mathematic calculation. It has double
precision which is faster than the single precision. Function such as sin()and sqrt() etc, re-
turn double values.
Declaration
Double pi, r, a;
r = 10.4;
pi = 3.14;
a = pi* r * r;
Characters
• The data type used store or declare character in java is char.
• It is 16-bit type in java. Range of a char is 0 to 65,536.
• There are no chars which are negative in nature.
Program demonstration for char
Class charExample
{
Public static void main (String args []) {
Char a, b;
a=88;
b='y';
system.out.print (“a and b: “);