# BitMaskClear

Returns number bitwise cleared with length bits beginning from start.

See also BitMaskRead and BitMaskSet.

### Syntax

    BitMaskClear(number, start, length)

##### number

Long integer to be masked.

##### start

Integer specifying the starting bit for masking.

##### length

Integer specifying the length of mask.

### Usage

Parameters start and length must be in the range from 0 to 31.

Bit functions operate on 32-bit integers.

### Examples

    <!--- This example shows BitMaskClear --->
    <HTML>
    <HEAD>
    <TITLE>BitMaskClear Example</TITLE>
    </HEAD>

    <BODY>
    <H3>BitMaskClear Example</H3>

    <P>Returns number bitwise cleared with
    length bits beginning from start.

    <P>BitMaskClear(255, 4, 4): <CFOUTPUT>#BitMaskClear(255, 4, 4)#
    </CFOUTPUT>
    <P>BitMaskClear(255, 0, 4): <CFOUTPUT>#BitMaskClear(255, 0, 4)#
    </CFOUTPUT>
    <P>BitMaskClear(128, 0, 7): <CFOUTPUT>#BitMaskClear(128, 0, 7)#
    </CFOUTPUT>

    </BODY>
    </HTML>