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BITTEST( ) Function

  • 项目

Returns True (.T.) if a specified bit in a numeric value is set to 1; otherwise, returns False (.F.).

BITTEST(nExpression1, nExpression2)

Return Values

Logical

Parameters

  • nExpression1
    Specifies the numeric value in which a bit is checked. If nExpression1 is not an integer, it is converted to an integer before its bit is checked.
  • nExpression2
    Specifies the bit position in nExpression1 that is checked. nExpression2 can range from 0 to 31; 0 is the rightmost bit.

Example

The following example uses BITTEST( ) 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.).

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)

See Also

BITAND( ) | BITCLEAR( ) | BITLSHIFT( ) | BITNOT( ) | BITOR( ) | BITRSHIFT( ) | BITSET( ) | BITXOR( )