Object Oriented Programming Through Java by Pearson

3.12 Java Basics and Control Loops

Line Nos. 37 to 43:   obtain values for three coefficients num1, num2, num3 form

keyboard. Notice that we have used try and catch blocks for detect-

ing any errors while reading input from keyboard using

System.

in

and BufferedReeader object.

3.8 Unary Operators

In unary operators, operator precedes a single operand. Unary operators are: unary minus (- ),

Increment and decrement operators : ++ , -- . . Examples are : - 4.0 , -5*(A+B)

++ i , i++ , --i , i—

Minus operator is both a unary and a binary operator. Unary minus, for example -5.0 oper-

ates on variable on its right, while the binary operator has variables ...