In mathematics, the floor function is the function that takes as input a real number x, and gives as output the greatest integer less than or equal to x, denoted ⌊x⌋ or floor (x). Similarly, the ceiling …

Dec 5, 2016 · The meaning of CEIL is to furnish (something, such as a wooden ship) with a lining.

May 16, 2025 · Difference between ceil () and floor () in C++ The ceil and floor functions are important for rounding numbers. Let us see the differences between ceil () and floor () …

Oct 15, 2023 · The library provides overloads of std::ceil for all cv-unqualified floating-point types as the type of the parameter.(since C++23) (See math-floating-point and deduced-simd-t for …

The ceil() function is defined in the <cmath> header file. Tip: To round a number DOWN to the nearest integer, look at the floor () function. Tip: To round a number to the nearest integer in …

Rounds x upward, returning the smallest integral value that is not less than x. Header <tgmath.h> provides a type-generic macro version of this function. Value to round up. The smallest …

Upon successful completion, ceil (), ceilf (), and ceill () shall return the smallest integral value not less than x, expressed as a type double, float, or long double, respectively.

In this article, we’ll dive into the ceil function, which lets us round a number up in C/C++. First, we’ll see how to use it with an example and then we’ll try implementing it ourselves.

The ceil() function in C++ returns the smallest possible integer value which is greater than or equal to the given argument. It is defined in the cmath header file.

Jul 9, 2025 · Return value The ceil functions return a floating-point value that represents the smallest integer that is greater than or equal to x. There's no error return.