a = 10 b = 4

a+b = 14

a-b = 6

a*b = 40

a/b = 2 (Integer Division)

a%b = 2

Code Understanding

int a=10; int b=4;
Integer variables a and b have been initialised here

int c=a+b; //addition operator
int d=a-b; //subtraction operator
int e=a*b; //multiplication operator
int f=a/b; //Division Operator
int g=a%b; //Modulus operator to get the remainder after division

System.out.println(“a = “+a+” b = “+b);
System.out.println(“a+b = “+c);
System.out.println(“a-b = “+d);
System.out.println(“a*b = “+e);
System.out.println(“a/b = “+f+” (Integer Division)”);
System.out.println(“a%b = “+g);
Operator based results are printed above.

Notes

• Unlike c/c++ the % operator works for floating point numbers also in java. Rounding difference can certainly be there. One can get good understanding of modulus in java at the following link.
  http://mindprod.com/jgloss/modulus.html
• A programmer has to watch for divide by zero error as this error may not be shown at compile time.
• Once must take care of precedence of operators while making composite statements with operators. The precedence rule document is linked at
  https://docs.oracle.com/javase/tutorial/java/nutsandbolts/operators.html

Common Errors

• One may often forget that in the integer form 10/4 would be 2 and not 2.5 as the fractional portion would be ignored while storing in integer form. If we use double or float form, 10/4 will have to be written as 10.0/4 and stored as double or float, then it would be 2.5.

Suggested Filename(s): ArithmeticOp.java