Library Function ceil in Math Class
Library Function ceil of math.h Header File in C
On this page we will discuss about library function ceil in math class which is used in C.
The C header file math.h contains the standard math library functions that can be used for performing various mathematical operations. The ceil function returns the nearest greater integer than the argument passed.
Library Function ceil of math.h Header File
In C programming language the ceil function is included in math.h header file.
The range of input argument which is passed to ceil function is not limited here as it can be any value from int to float or double but then has to be type casted into double type.
Declaration of ceil function
double ceil(double x)
Parameters of ceil function
The ceil function accepts a single input argument which is a double value.
| Parameter | Description |
|---|---|
| double value | This value of double function ranges from all positive and negative numbers. |
Return value of ceil function
The ceil function returns a nearest integer value greater than the argument passed and it’s type is double.
| Parameter | Return Value |
|---|---|
| Nearest Integer greater than argument | It returns the value of int type. |
Implementation of Library Function math.h ceil
Example 1:
The following code shows the use of ceil function.
#include<stdio.h>
#include<conio.h>
int main()
{
double num = 8.33;
int result;
result = ceil(num);
printf("Ceiling integer of %.2f = %d", num, result);
return 0;
}
Output:
Ceiling integer of 8.33 = 9
Example 2:
#include<stdio.h>
#include<conio.h>
int main ()
{
float val1, val2, val3, val4;
val1 = 1.6;
val2 = 1.2;
val3 = 2.8;
val4 = 2.3;
printf ("value1 = %.1lf\n", ceil(val1));
printf ("value2 = %.1lf\n", ceil(val2));
printf ("value3 = %.1lf\n", ceil(val3));
printf ("value4 = %.1lf\n", ceil(val4));
return 0;
}
Output:
value1 = 2.0 value2 = 2.0 value3 = 3.0 value4 = 3.0
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