Because ceil is a static method of Math, you always use it as Math.ceil, rather than as a method of a Math object you created (Math is not a constructor). Double ceil (double x); float ceil (float x); long double ceil (long double x); Round up value Rounds x upward, returning the smallest integral value that is not less than x. Apart from the causes already discussed, “undefined reference” may also occur because of the following reasons. #4) Wrong Project Type. When we specify wrong project types in C IDEs like the visual studio and try to do things that the project does not expect, then, we get “undefined reference”.

1. Ceilf
2. Undefined Reference To Symbol Ceil

The Math.ceil() function always rounds a number up to the next largest integer.

Note: Math.ceil(null) returns integer 0 and does not give a NaN error.

Syntax

Parameters

Return value

The smallest integer greater than or equal to the given number.

Description

Because ceil() is a static method of Math, you always use it as Math.ceil(), rather than as a method of a Math object you created (Math is not a constructor).

Examples

Using Math.ceil()

The following example shows example usage of Math.ceil().

Decimal adjustment

Specifications

Browser compatibility

BCD tables only load in the browser

See also

Ceilf

Similar topics

Undefined Reference To Symbol Ceil