std::isnormal
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | Defined in header  <cmath> | ||
| bool isnormal( float arg ); | (since C++11) | |
| bool isnormal( double arg ); | (since C++11) | |
| bool isnormal( long double arg ); | (since C++11) | |
Determines if the given floating point number arg is normal, i.e. is neither zero, subnormal, infinite, nor NaN.  
[edit] Parameters
| arg | - | floating point value | 
[edit] Return value
true if arg is normal, false otherwise
[edit] See also
| (C++11) | categorizes the given floating point value (function) | 
| (C++11) | checks if the given number has finite value (function) | 
| (C++11) | checks if the given number is infinite (function) | 
| (C++11) | checks if the given number is NaN (function) | 
| C documentation for isnormal | |


