C++ <valarray> - operator! Function

The C++ valarray::operator! function is used to apply unary not operator to each element of the valarray.

Syntax

valarray<bool> operator!() const;

Parameters

No parameter is required.

Return Value

Returns a new valarray object with modified values.

Time Complexity

Depends on library implementation.

Example:

In the example below, the valarray::operator! function is used to perform unary not operation on each element of the given valarray.

#include <iostream>
#include <valarray>
using namespace std;
 
int main (){
  valarray<bool> varr1 {true, false, true};
  
  //result of unary not operation 
  //on varr1 is stored in varr2
  valarray<bool> varr2 = !varr1;

  cout<<boolalpha;
  cout<<"varr1 contains: ";
  for(int i = 0; i < varr1.size(); i++)
    cout<<varr1[i]<<" ";

  cout<<"\nvarr2 contains: ";
  for(int i = 0; i < varr2.size(); i++)
    cout<<varr2[i]<<" ";   
    
  return 0;
}

The output of the above code will be:

varr1 contains: true false true 
varr2 contains: false true false

❮ C++ <valarray> Library