﻿ BITTEST( ) Function

js editor     Web development ﻿

Main Page

Determines whether a specific bit in a Numeric, Varbinary, or Blob value is set to 1. There is a numeric and a binary version of the syntax.

Note:
If the specified expression is not an integer, it is converted to an integer before performing the operation.

`BITTEST(nNumericExpression1, nNumericExpression2)`
`BITTEST(BinaryExpression, nBitNumber)`

#### Parameters

nNumericExpression1

Specifies the Numeric value to check for the specified bit.
nNumericExpression2

Specifies the bit position in nExpression1 to check. nExpression2 can range from 0 to 31 with 0 as the bit farthest to the right.
BinaryExpression

Specifies a Varbinary or Blob expression to check for the specified bit.
nBitNumber

Specifies a zero-based bit in qExpression. If nBitNumber is out of range of qExpression, Visual FoxPro generates an error.

# Return Value

Logical. BITTEST(В ) returns True (.T.) if the specified bit is set to 1; otherwise, it returns False (.F.).

# Example

The following example uses BITTEST(В ) to determine whether a series of integers are even. If an integer is even, the function `IsEven` returns True (.T.); otherwise, it returns False (.F.).

В Copy Code
```CLEAR
? '2 even? '
?? IsEven(2)  && Even, .T. returned
? '3 even? '
?? IsEven(3)  && Not even, .F. returned
? '0 even? '
?? IsEven(0)  && Even, .T. returned
? '-13 even? '
?? IsEven(-13)  && Not even, .F. returned

Function IsEven
PARAMETER nInteger
RETURN NOT BITTEST(nInteger, 0)```