C Programming - C Arithmetic Operators

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C Programming - C Arithmetic Operators

C Arithmetic Operators

Arithmetic operators in C are used to perform basic mathematical operations such as addition, subtraction, multiplication, division, and finding the remainder. These operators work with integer, floating-point, and other numerical data types.

List of Arithmetic Operators

Key Characteristics

1. Addition (+): Adds two numbers.

int a = 5, b = 3;
printf("Sum: %d\n", a + b); // Output: 8

1. Subtraction (-): Subtracts the second number from the first.

int a = 5, b = 3;
printf("Difference: %d\n", a - b); // Output: 2

1. Multiplication (*): Multiplies two numbers.

int a = 5, b = 3;
printf("Product: %d\n", a * b); // Output: 15

1. Division (/):
• Returns the quotient of two numbers.
• For integer division, the result is truncated (fractional part is discarded).

int a = 5, b = 2;
printf("Quotient: %d\n", a / b); // Output: 2

• For floating-point numbers, it returns the exact quotient.

float a = 5.0, b = 2.0;
printf("Quotient: %.2f\n", a / b); // Output: 2.50

1. Modulus (%):
• Returns the remainder of integer division.
• Works only with integers.

int a = 5, b = 3;
printf("Remainder: %d\n", a % b); // Output: 2

Example Program

#include <stdio.h>
 
int main() {
    int a = 10, b = 4;
    float x = 10.5, y = 4.2;
 
    printf("Addition (int): %d\n", a + b);
    printf("Subtraction (int): %d\n", a - b);
    printf("Multiplication (int): %d\n", a * b);
    printf("Division (int): %d\n", a / b);
    printf("Modulus (int): %d\n", a % b);
 
    printf("Addition (float): %.2f\n", x + y);
    printf("Subtraction (float): %.2f\n", x - y);
    printf("Multiplication (float): %.2f\n", x * y);
    printf("Division (float): %.2f\n", x / y);
 
    return 0;
}

Output:

Addition (int): 14
Subtraction (int): 6
Multiplication (int): 40
Division (int): 2
Modulus (int): 2
Addition (float): 14.70
Subtraction (float): 6.30
Multiplication (float): 44.10
Division (float): 2.50

Important Notes

1. Division with Integers:
• If both operands are integers, the result is an integer (truncated).

int a = 7, b = 3;
printf("%d\n", a / b); // Output: 2

1. Floating-Point Division:
• At least one operand must be a floating-point number to retain the decimal part.

float a = 7.0, b = 3.0;
printf("%.2f\n", a / b); // Output: 2.33

1. Modulus Operator:
• Only applicable to integers.
• Using % with floating-point numbers results in a compilation error.
2. Operator Precedence:
• Multiplication, division, and modulus (*, /, %) have higher precedence than addition and subtraction (+, -).

int result = 10 + 5 * 2; // Evaluates as 10 + (5 * 2) = 20

• Use parentheses to enforce precedence.

int result = (10 + 5) * 2; // Evaluates as (10 + 5) * 2 = 30

Applications

• Arithmetic operators are fundamental in mathematical computations, such as:
• Solving equations
• Calculating percentages
• Building algorithms
• Data processing and analysis