Arithmetic Operators and Expressions

Back - C Language Notes By Vivek Sir email: vivekdubey22@gmail.com (w) 9826424484

• The symbols which are used to perform logical and mathematical operations in a C program are called C operators.
• These C operators join individual constants and variables to form expressions.
• Operators, functions, constants and variables are combined together to form expressions.
• Consider the expression A + B * 5. where, +, * are operators, A, B  are variables, 5 is constant and A + B * 5 is an expression.

Types of C operators:

C language offers many types of operators. They are,

Types of Operators	Description
Arithmetic_operators	These are used to perform mathematical calculations like addition, subtraction, multiplication, division and modulus
Assignment_operators	These are used to assign the values for the variables in C programs.
Relational operators	These operators are used to compare the value of two variables.
Logical operators	These operators are used to perform logical operations on the given two variables.
Bit wise operators	These operators are used to perform bit operations on given two variables.
Conditional (ternary) operators	Conditional operators return one value if condition is true and returns another value is condition is false.
Increment/decrement operators	These operators are used to either increase or decrease the value of the variable by one.
Special operators	&, *, sizeof( ) and ternary operators.

 

Simple Assignment Statement,

C provides an assignment operator for this purpose, assigning the value to a variable using assignment operator is known as an assignment statement in C.

The function of this operator is to assign the values or values in variables on right hand side of an expression to variables on the left hand side.

The syntax of the assignment expression

Variable = constant / variable/ expression;

The data type of the variable on left hand side should match the data type of constant/variable/expression on right hand side with a few exceptions where automatic type conversions are possible.

Examples of assignment statements,

b = c ; /* b is assigned the value of c */

a = 9 ; /* a is assigned the value 9*/

b = c+5; /* b is assigned the value of expr c+5 */

The expression on the right hand side of the assignment statement can be:

An arithmetic expression;

A relational expression;

A logical expression;

A mixed expression.

For example,

int a;
float b,c ,avg, t;
avg = (b+c) / 2; /*arithmetic expression */
a = b && c; /*logical expression*/
a = (b+c) && (b<c); /* mixed expression*/