INFINITY

From cppreference.com
 
 
 
Common mathematical functions
Functions
Basic operations
remainder (C++11)
remquo (C++11)
fma (C++11)
fmax (C++11)
fmin (C++11)
fdim (C++11)
nan
nanf
nanl
(C++11)
(C++11)
(C++11)
Exponential functions
exp
exp2 (C++11)
expm1 (C++11)
log
log10
log1p (C++11)
log2 (C++11)
Power functions
sqrt
cbrt (C++11)
hypot (C++11)
pow
Trigonometric and hyperbolic functions
sinh
cosh
tanh
asinh (C++11)
acosh (C++11)
atanh (C++11)
Error and gamma functions
erf (C++11)
erfc (C++11)
lgamma (C++11)
tgamma (C++11)
Nearest integer floating point operations
ceil
floor
round
lround
llround
(C++11)
(C++11)
(C++11)
trunc (C++11)
nearbyint (C++11)
rint
lrint
llrint
(C++11)
(C++11)
(C++11)
Floating point manipulation functions
ldexp
scalbn
scalbln
(C++11)
(C++11)
ilogb (C++11)
logb (C++11)
frexp
modf
nextafter
nexttoward
(C++11)
(C++11)
copysign (C++11)
Classification
fpclassify (C++11)
isfinite (C++11)
isinf (C++11)
isnan (C++11)
isnormal (C++11)
signbit (C++11)
Macro constants
HUGE_VALF
HUGE_VAL
HUGE_VALL
(C++11)

(C++11)
INFINITY (C++11)
NAN (C++11)
math_errhandling
MATH_ERRNO
MATH_ERREXCEPT
(C++11)
FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
FLT_EVAL_METHOD (C++11)
 
Defined in header <cmath>
#define INFINITY /*implementation defined*/
(since C++11)

The macro INFINITY expands to constant expression of type float which evaluates to positive or unsigned infinity, if supported by implementation, or to a positive value that is guaranteed to overflow a float at compile time.

[edit] See also

[static]
returns the positive infinity value of the given floating-point type
(public static member function of std::numeric_limits)
(C++11)
checks if the given number is infinite
(function)