# operator!= (<valarray>)

Visual Studio 2013

Tests whether the corresponding elements of two equally sized valarrays are unequal or whether all the elements of a valarray are unequal a specified value.

```template<class Type>
valarray<bool> operator!=(
const valarray<Type>& _Left,
const valarray<Type>& _Right
);
template<class Type>
valarray<bool> operator!=(
const valarray<Type>& _Left,
const Type& _Right
);
template<class Type>
valarray<bool> operator!=(
const Type& _Left,
const valarray<Type>& _Right
);
```

## Parameters

_Left

The first of the two valarrays whose elements are to be tested for inequality.

_Right

The second of the two valarrays whose elements are to be tested for inequality.

## Return Value

A valarray of Boolean values, each of which is:

• true if the corresponding elements are unequal.

• false if the corresponding elements are not unequal.

## Remarks

The first template operator returns an object of class valarray<bool>, each of whose elements I is _Left[I] != _Right[I].

The second template operator stores in element I _Left[I] != _Right.

The third template operator stores in element I _Left != _Right[I].

## Example

```// valarray_op_ne.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>

int main( )
{
using namespace std;
int i;

valarray<int> vaL ( 10 ), vaR ( 10 );
valarray<bool> vaNE ( 10 );
for ( i = 0 ; i < 10 ; i += 2 )
vaL [ i ] =  -i;
for ( i = 1 ; i < 10 ; i += 2 )
vaL [ i ] =  i;
for ( i = 0 ; i < 10 ; i++ )
vaR [ i ] =  i;

cout << "The initial Left valarray is: ( ";
for ( i = 0 ; i < 10 ; i++ )
cout << vaL [ i ] << " ";
cout << ")." << endl;

cout << "The initial Right valarray is: ( ";
for ( i = 0 ; i < 10 ; i++ )
cout << vaR [ i ] << " ";
cout << ")." << endl;

vaNE = ( vaL != vaR );
cout << "The element-by-element result of "
<< "the not equal comparison test is the\n valarray: ( ";
for ( i = 0 ; i < 10 ; i++ )
cout << vaNE [ i ] << " ";
cout << ")." << endl;
}
```
```The initial Left valarray is: ( 0 1 -2 3 -4 5 -6 7 -8 9 ).
The initial Right valarray is: ( 0 1 2 3 4 5 6 7 8 9 ).
The element-by-element result of the not equal comparison test is the
valarray: ( 0 0 1 0 1 0 1 0 1 0 ).```