Math

Lesson 9
Author : Afrixi
Last Updated : January, 2023

C - Programming Language

This course covers the basics of programming in C.

Mathematical operations in C can be performed using arithmetic operators. Here are the arithmetic operators in C:

+: Addition
-: Subtraction
*: Multiplication
/: Division
%: Modulo (remainder after division) Here are some examples:

#include <stdio.h>

int main() {
   int a = 10, b = 20, c;
   float x = 3.14, y = 2.5, z;
   
   c = a + b;
   printf("a + b = %d\n", c);
   
   c = a - b;
   printf("a - b = %d\n", c);
   
   c = a * b;
   printf("a * b = %d\n", c);
   
   z = x / y;
   printf("x / y = %f\n", z);
   
   c = b % a;
   printf("b %% a = %d\n", c);
   
   return 0;
}

Output:

a + b = 30
a - b = -10
a * b = 200
x / y = 1.256000
b % a = 0

In the above example, we have performed arithmetic operations on integers and floating-point numbers using different arithmetic operators. Note that the modulus operator % returns the remainder after division.

In addition to arithmetic operators, C provides math functions that can perform more complex mathematical operations. Some of these functions are:

sqrt(x): Returns the square root of x.
pow(x, y): Returns x raised to the power of y.
sin(x), cos(x), tan(x): Returns the sine, cosine, and tangent of x, respectively.
log(x), log10(x): Returns the natural logarithm and base-10 logarithm of x, respectively. Here’s an example that demonstrates the usage of sqrt() and pow() functions:

#include <stdio.h>
#include <math.h>

int main() {
   float x = 25, y = 3;
   
   printf("sqrt(%f) = %f\n", x, sqrt(x));
   printf("%f ^ %f = %f\n", x, y, pow(x, y));
   
   return 0;
}

Output:

sqrt(25.000000) = 5.000000
25.000000 ^ 3.000000 = 15625.000000

In the above example, we have included the math.h header file to use the sqrt() and pow() functions.

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