Double:

In C, the double data type is used to represent double-precision floating-point numbers. It provides a higher precision compared to the float data type. The double type typically occupies 8 bytes in memory.

Example:

#include <stdio.h>

int main() {
    // Declaration and initialization of double variables
    double value1 = 3.141592653589793;
    double value2 = -2.71828;
    double sum, product;

    // Performing arithmetic operations
    sum = value1 + value2;
    product = value1 * value2;

    // Displaying the values and results
    printf(“Value 1: %fn”, value1);
    printf(“Value 2: %fn”, value2);
    printf(“Sum: %fn”, sum);
    printf(“Product: %fn”, product);

    return 0;
}

 

Output:

Value 1: 3.141593
Value 2: -2.718280
Sum: 0.423313
Product: -8.539734

Explanation of code:

• #include <stdio.h>: This line includes the standard input-output library for functions like printf.
• int main(): The main function, where the program execution begins.
• double value1 = 3.141592653589793; and double value2 = -2.71828;: Declaration and initialization of double variables.
• double sum, product;: Declaration of two more double variables without initialization.
• sum = value1 + value2; and product = value1 * value2;: Performing arithmetic operations.
• printf(“Value 1: %fn”, value1);: Printing the value of value1 using the %f format specifier.
• Similarly, the values of value2, sum, and product are printed using printf.
• return 0;: Indicates successful program execution.