C Examples Multiplication

Real-Time Uses of Multiplication

1. Financial Calculations
   • Calculating total price: price * quantity
   • Interest calculation: principal * rate
2. Physics and Engineering
   • Area of a rectangle: length * width
   • Volume: length * width * height
   • Force calculation: mass * acceleration
3. Data Analysis & Statistics
   • Weighted averages: value * weight
   • Scaling datasets: multiplying each data point by a factor
4. Embedded Systems & IoT
   • Sensor calibration: raw_value * calibration_factor
   • Real-time computation in control systems
5. Computer Graphics
   • Scaling images: pixel_coordinate * scale_factor
   • Calculating transformations in 2D/3D graphics

C Program for Two Floating-Point Multiplication

The program accepts two numbers from the user, multiplies them, and displays the product with precision up to two decimal places.

#include <stdio.h>


void main()
{
    double first_num, second_num, product;
    printf("Enter two numbers: ");

    // Stores two floating point numbers in variables
    scanf("%lf %lf", &first_num, &second_num);

    // Performs multiplication and stores the result in variable product
    product = first_num * second_num;

    // Result up to 2 decimal point is displayed using %.2lf
    printf("Product of %f * %f = %.2lf", first_num, second_num,product);
}

Output:

Enter two numbers:
8.2
1.5
Product of 8.200000 * 1.500000 = 12.30
--------------------------------
Process exited after 12.78 seconds with return value 38
Press any key to continue . . .

Explanation:

Code Explanation

#include <stdio.h>

• Includes the standard input/output library for using printf and scanf.

void main()
{
    double first_num, second_num, product;

• Declares three double precision variables:
  • first_num → First input number
  • second_num → Second input number
  • product → Stores the result of multiplication

printf("Enter two numbers: ");
scanf("%lf %lf", &first_num, &second_num);

• Prompts the user to enter two numbers.
• %lf format specifier is used for double type inputs.

product = first_num * second_num;

• Performs multiplication of the two numbers and stores the result in product.

printf("Product of %f * %f = %.2lf", first_num, second_num, product);

• Displays the product:
  • %f → Prints first_num and second_num
  • %.2lf → Prints product rounded to 2 decimal places

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C Program to Convert Inch to Feet

Pr-Request to learn

• Preprocessor command #
• Header file
• Variable declare & define
• Multiplication * operator
• printf() function

Code:

#include<stdio.h>

int main()
{
    int inches, feet;
    feet = 10;
    inches = feet*12;
    printf("there are %d inches in %d feet./n", inches, feet);
}

Output: there are 120 inches in 10 feet

Code Explanation:

• #include<stdio.h> is a standard input output header file.
• C requires a ; semicolon at every end of the statement.
• printf() is a standard C function (Called from main)
• \n signifies a new line.

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