Front-end Tutorials

Front-end Tutorials

HTMLCSSSassJavaScriptReactJS
CMS Tutorials

CMS Tutorials

WordPress
Tutorials expand

C ceil() Function

Posted in C Tutorial
Updated on Nov 27, 2024
By Mari Selvan
👁ī¸ 128 - Views
âŗ 4 mins
đŸ’Ŧ 1 Comment
C ceil() Function

Photo Credit to CodeToFun

🙋 Introduction

In C programming, the ceil() function is a part of the <math.h> header file, and it is used to calculate the smallest integer value greater than or equal to a given floating-point number.

The term "ceil" stands for "ceiling," and this function is particularly useful when you need to round up a decimal number to the nearest integer.

In this tutorial, we'll explore the usage and functionality of the ceil() function in C.

💡 Syntax

The syntax for the ceil() function is as follows:

Syntax
Copied
Copy To Clipboard
double ceil(double x);
  • x: A floating-point number for which you want to find the ceiling value.

The function returns the smallest integral value that is not less than x.

📄 Example

Let's dive into an example to illustrate how the ceil() function works.

ceil.c
Copied
Copy To Clipboard
#include <stdio.h>
#include <math.h>

int main() {
  double number = 8.45;

  // Using ceil() function to round up the number
  double roundedUp = ceil(number);

  printf("Original number: %.2f\n", number);
  printf("Rounded up: %.2f\n", roundedUp);

  return 0;
}

đŸ’ģ Output

Output
Original number: 8.45
Rounded up: 9.00

🧠 How the Program Works

In this example, the ceil() function is used to round up the floating-point number 8.45 to the nearest integer.

↩ī¸ Return Value

The ceil() function returns a double value representing the smallest integer value that is greater than or equal to the given argument x.

📚 Common Use Cases

The primary use case for the ceil() function is when you need to ensure that a floating-point number is rounded up to the nearest integer. This is often required in situations where fractional values should be rounded up to the next whole number.

📝 Notes

  • Be cautious about using the ceil() function with negative numbers, as the behavior may not always match expectations. If you need to round negative numbers to the nearest integer, consider adjusting your logic accordingly.

đŸŽĸ Optimization

The ceil() function is typically optimized for performance, and no additional optimization is required.

🎉 Conclusion

The ceil() function in C is a valuable tool when precision matters, and you need to round up floating-point numbers to the nearest integer. Understanding how to use this function can be crucial in scenarios where accurate numerical results are essential.

Feel free to experiment with different floating-point numbers and explore how the ceil() function behaves in various scenarios. Happy coding!

👨‍đŸ’ģ Join our Community:

To get interesting news and instant updates on Front-End, Back-End, CMS and other Frameworks. Please Join the Telegram Channel:

Author

author
👋 Hey, I'm Mari Selvan

For over eight years, I worked as a full-stack web developer. Now, I have chosen my profession as a full-time blogger at codetofun.com.

Buy me a coffee to make codetofun.com free for everyone.

Buy me a Coffee

Share Your Findings to All

Subscribe
Notify of
guest
1 Comment
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
Mari Selvan
Mari Selvan
1 year ago

If you have any doubts regarding this article (C ceil() Function) please comment here. I will help you immediately.

We make use of cookies to improve our user experience. By using this website, you agree with our Cookies Policy
AgreeCookie Policy