math.h

From Wikipedia, the free encyclopedia

C Standard Library headers

assert.h complex.h ctype.h errno.h fenv.h float.h inttypes.h iso646.h limits.h locale.h math.h setjmp.h signal.h stdarg.h stdbool.h stddef.h stdint.h stdio.h stdlib.h string.h tgmath.h time.h wchar.h wctype.h

math.h is a header file in the standard library of C programming language designed for basic mathematical operations. Most of the functions involve the use of floating point numbers. C++ also implements these functions for compatibility reasons and declares them in the header cmath.

All functions that take or return an angle work in radians.

[edit] Pre-C99 member functions

Name	Description
acos	arccosine
asin	arcsine
atan	arctangent
atan2	two-parameter arctangent
ceil	smallest integer not less than parameter
cos	cosine
cosh	hyperbolic cosine
exp	exponential function
fabs	absolute value
floor	largest integer not greater than parameter
fmod	floating point remainder
frexp	fraction and power of 2.
ldexp	scale exponent of floating-point value
log	natural logarithm
log10	base-10 logarithm
modf(x,p)	returns fractional part of x and stores integral part where pointer p points to
pow(x,y)	compute a value taken to an exponent, xy
sin	sine
sinh	hyperbolic sine
sqrt	square root
tan	tangent
tanh	hyperbolic tangent

[edit] Extra links

• math.h: mathematical declarations – Base Definitions Reference, The Single UNIX® Specification, Issue 6 from The Open Group
• Dinkumware math.h reference, a reference of all math.h functions