Arithmetic Operators

There are five main arithmetic operators in ‘C’. They are ‘+’ for additions,‘-' for subtraction, ‘*’ for multiplication, ‘/’ for division.
Operands can be integer quantities, floating-point quantities or characters.

The division operator (/) requires that the second operand be nonzero.


If division operation is carried out with two floating- point numbers, or with one floating point number. & one integer, the result will be a floating-point quotient.


If we take two variables say x and y and their values are 20 and 10
respectively, and apply operators like addition, subtraction, division,
multiplication and modulus on them then their resulted values will
be as follows:
x+y=30
x-y=10
x*y=200
x/y=2


If one or both operands represent negative values, then the addition, subtraction, multiplication and division operations will result in values whose signs are determined by the usual rules of algebra.

• If one operand is a floating point type and the other is a char or an int, the char/int will be converted to the floating point type of the other operand and the result will be expressed as such.So, an operation between an int and a double will result in double.
• If both operands are floating-point types with different precisions, the lower-precision operand will be converted to the precision of the other operand and the result will be expressed in this higher precision.

1. Float & double -->double
2. Float & long double -->long double
3. Double & long double -->long double

• If neither operand is a floating point type or a long int, then both operands will be converted to int & the result will be int.
• If neither operand is a floating point type but one is a long int,the other will be converted to long int & the result will be long int.

The operator within C are grouped hierarchically according to their order of evaluation known as precedence.

Arithmetic operators *,/ and % are under one precedence group and +,- are under another precedence group. The operators *, / and % have higher precedence than + and -.

Example

main()

{
int a,b,c;

a=10;

b=20;

c=a+b;

printf("%d",c);

c=x-y;

printf("%d",c);

c=x*y;

printf("%d",c);

c=x/y;

printf("%d",c);

}