_rotl, _rotl64, _rotr_rotr64
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# _rotl, _rotl64, _rotr_rotr64

Visual Studio .NET 2003

Rotate bits to the left (_rotl) or right (_rotr).

```unsigned int _rotl(
unsigned int value,
int shift
);
unsigned __int64 _rotl64(
unsigned __int64 value,
int shift
);
unsigned int _rotr(
unsigned int value,
int shift
);
unsigned __int64 _rotl64(
unsigned __int64 value,
int shift
);
```

#### Parameters

value
Value to be rotated.
shift
Number of bits to shift.

#### Return Value

The rotated value. There is no error return.

#### Remarks

The _rotl and _rotr functions rotate the unsigned value by shift bits. _rotl rotates the value left. _rotr rotates the value right. Both functions "wrap" bits rotated off one end of value to the other end.

#### Requirements

_rotl, _rotl64 <stdlib.h> Win 98, Win Me, Win NT, Win 2000, Win XP
_rotr, _rotr64 <stdlib.h> Win 98, Win Me, Win NT, Win 2000, Win XP

For additional compatibility information, see Compatibility in the Introduction.

Libraries

All versions of the C run-time libraries.

#### Example

```// crt_rot.c
/* This program shifts values to rotate an integer.
*/

#include <stdlib.h>
#include <stdio.h>

int main( void )
{
unsigned val = 0x0fd93;
__int64 val2 = 0x0101010101010101;

printf( "0x%4.4x rotated left three times is 0x%4.4x\n",
val, _rotl( val, 3 ) );
printf( "0x%4.4x rotated right four times is 0x%4.4x\n",
val, _rotr( val, 4 ) );

printf( "%I64x rotated left three times is %I64x\n",
val2, _rotl64( val2, 3 ) );
printf( "%I64x rotated right four times is %I64x\n",
val2, _rotr64( val2, 4 ) );
}
```

#### Output

```0xfd93 rotated left three times is 0x7ec98
0xfd93 rotated right four times is 0x30000fd9
101010101010101 rotated left three times is 808080808080808
101010101010101 rotated right four times is 1010101010101010
```