Reference
C Library
IOstream Library
Strings library
STL Containers
STL Algorithms
Miscellaneous

C Library
cassert (assert.h)
cctype (ctype.h)
cerrno (errno.h)
cfloat (float.h)
ciso646 (iso646.h)
climits (limits.h)
clocale (locale.h)
cmath (math.h)
csetjmp (setjmp.h)
csignal (signal.h)
cstdarg (stdarg.h)
cstddef (stddef.h)
cstdio (stdio.h)
cstdlib (stdlib.h)
cstring (string.h)
ctime (time.h)

cstdlib (stdlib.h)
functions:
abort
abs
atexit
atof
atoi
atol
bsearch
calloc
div
exit
free
getenv
labs
ldiv
malloc
mblen
mbstowcs
mbtowc
qsort
rand
realloc
srand
strtod
strtol
strtoul
system
wcstombs
wctomb
functions (non-standard):
itoa
macros:
EXIT_FAILURE
EXIT_SUCCESS
MB_CUR_MAX
NULL
RAND_MAX
types:
div_t
ldiv_t
size_t

abs

function

<cstdlib>

int abs ( int n );
long abs ( long n );

Absolute value

Returns the absolute value of parameter n ( /n/ ).

In C++, this function is overloaded in <cmath> for floating-point types (see cmath abs), in <complex> for complex numbers (see complex abs), and in <valarray> for valarrays (see valarray abs).

Parameters

n: Integral value.

Return Value

The absolute value of n.

Portability

In C, only the int version exists.

Example

1 2 3 4 5 6 7 8 9 10 11 12 13

/* abs example */
#include <stdio.h>
#include <stdlib.h>
int main ()
{
  int n,m;
  n=abs(23);
  m=abs(-11);
  printf ("n=%d\n",n);
  printf ("m=%d\n",m);
  return 0;
}

Output:


n=23
m=11

abs

Parameters

Return Value

Portability

Example

See also