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 …

May 23, 2024 · 4) Type-generic macro: If arg has type longdouble, ceill is called. Otherwise, if arg has integer type or the type double, ceil is called. Otherwise, ceilf is called.

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 () …

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.

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

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.

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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 …

2 senses: 1. to line (a ceiling) with plaster, boarding, etc 2. to provide with a ceiling.... Click for more definitions.

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.