Expressions in C Programming - Types of Expressions in C ( With Examples )

The following types of arithmetic expressions are there:

• integer expression - an expression containing only integral operands,
• real expression - an expression containing only real operands
• mixed mode expression - an expression containing both integral and real operands

The arithmetic expression makes it easier to calculate computationally intensive tasks by programming each operation step-by-step. The precedence and associativity of operators decide the order of the evaluation of individual operations.

Type of results after evaluation of an arithmetic expression:

• When both the operands are of integer type, the result of the operation would be an integer value. The fractional part of the result is ignored.
• When both the operands are of float data type, the result of the operation would be a real value.
• If one operand is of type integer and another of type real, the first operand is converted into a real operand, and then the operation is performed, producing a real value as the result.

Example

2. Relational Expression in C

Relational expressions use comparison operators such as '>' (greater than) and '<' (less than) to compare two operands. The result of the comparison is a boolean value i.e. 0(false) or non-zero (true).

It is a condition that decides whether the action should be taken or not. Relational expressions are used in decision-making statements and looping statements in the C language.

Example

#include <stdio.h>
int main()
 {
 int x = 5, y = 10;
 if (x == y) {
 printf("x is equal to y\n");
 } else {
 printf("x is not equal to y\n");
 }
 return 0;
 }

The above code in C Compiler checks if x is equal to y or not

Output

x is not equal to y

3. Logical Expression in C

Logical expressions in C are a powerful tool for controlling the logic of the flow of the program. They are made by combining as many relational expressions as the programmer wants. It then determines if certain statements or groups of statements should be executed or not.

Example

#include <stdio.h>
int main() 
{ 
 int x = 10; 
 int y = 2; 
 if ( (x >10) || (y<5)) 
 { 
 printf("Condition is true"); 
 } 
 else 
 printf("Condition is false"); 
 return 0; 
}

Output

Condition is true

4. Conditional Expression in C

The conditional expression consists of three operands. It returns 1 if the condition is true otherwise 0. We had seen the conditional operator in the section, Operators in C. We will look at ternary operators in detail in the section Ternary Operator in C.

Example

#include <stdio.h> 
#include <string.h> 
int main() 
{ 
 int age = 29; 
 char status; 
 status = (age>22) ? 'M': 'U'; 
 if(status == 'M') 
 printf("Married"); 
 else 
 printf("Unmarried"); 
 return 0; }

Output

Married

Summary

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