How do you use the double data type in the C programming language?

2 years ago
Ava Mitchell
1 minute

In the C language, double is a data type used to represent double-precision floating-point numbers. Variables of type double can store a wider range and higher precision of floating-point numbers.

To declare a variable of type double, you can use the following syntax:

double variable_name;

To assign a value to a variable of type double, you can use the following syntax:

variable_name = value;

It’s important to note that variables of type double in C can be used for common mathematical operations such as addition, subtraction, multiplication, and division. Additionally, C provides standard library functions to manipulate double variables, such as sqrt() for calculating square roots, pow() for calculating powers, and so on.

Here is an example code to calculate the sum of two double type variables:

#include <stdio.h>

int main() {
   double num1, num2, sum;

   printf("Enter first number: ");
   scanf("%lf", &num1);

   printf("Enter second number: ");
   scanf("%lf", &num2);

   sum = num1 + num2;

   printf("Sum = %lf\n", sum);

   return 0;
}

In the code above, we use the %lf format specifier to read double type data inputted by the user and to print variables of type double.

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