Mathematical Functions - C++ Tutorial

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Cpp

Topic

What are Mathematical Functions in C++?

Explanation

Standard Function Library has a numerous set of Mathematical Functions. The header file required for mathematical functions are "<cmath>" or "<math.h>".

There are three macros used by Mathematical functions they are HUGE_VAL, EDOM, ERANGE that are declared using the header "<cerrno>" or the file "errno.h". In a function routine a large result or an overflow occurs it returns "HUGE_VAL" and the "errno" is set to "ERANGE" for a range error. When an underflow happens the function returns zero and sets the "errno" to "ERANGE". All the angles returned by cmath and math.h functions are in radians.

Following table lists few Mathematical functions of C++ Standard function Library. This function operated on "double" datatype, but now C++ also supports "float" and "long double".

Name	Description
acos	Returns the arc cosine value.
atan	Returns the arc tangent value.
cos	Returns the cosine value.
cosh	Returns the hyperolic cosine value.
atan2	Returns the arc tangent of y/x.
ceil	Returns the smallest integer not less than the given value.
exp	Returns the natural logarithm base "e" raised to the argument value.
fabs	Returns the absolute value of the num.
floor	Returns the largest Integer not greater than the given value.
fmod	Returns the remainder of two values.
frexp	Converts a number into a mantissa between the range .5 to less than 1.
ldexp	Returns the value of the number * 2 to the power of "exp"
log	Returns the natural algorithm for the given value.
log10	Returns the base 10 algorithm for a number.
modf	Segregates the number into its integer and fractional parts.
pow	Returns the exponential value.
sin()	Return the sine value for the argument.
sinh()sinh	Return the hyperbolic sine value for the argument.
sqrt()	Returns the square root of the argument.
tanh()	Return the hyperbolic tangent value for the argument.
tan()	Return the tangent value for the argument.