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BitMaskClear

 

Description

Performs a bitwise mask clear operation.

Returns

A number, bitwise cleared, with length bits beginning at start.

Category

Mathematical functions

Function syntax

BitMaskClear(number, start, length)

See also

BitMaskReadBitMaskSet

Parameters

Parameter

Description

number

32-bit signed integer

start

Integer, in the range 0-31, inclusive; start bit for mask

length

Integer, in the range 0-31, inclusive; length of mask

Usage

Bit functions operate on 32-bit signed integers, in the range -2147483648 - 2147483647.

Example

<h3>BitMaskClear Example</h3>

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

<p>BitMaskClear(255, 4, 4): <cfoutput>#BitMaskClear(255, 4, 4)#</cfoutput></p>
<p>BitMaskClear(255, 0, 4): <cfoutput>#BitMaskClear(255, 0, 4)#</cfoutput></p>
<p>BitMaskClear(128, 0, 7): <cfoutput>#BitMaskClear(128, 0, 7)#</cfoutput></p>

Example

<cfscript>
number = 255 ;
number1 = 0 ;
length =4 ;
writeOutput(bitmaskclear(number, number1, length)) ; //Return 240
</cfscript>
<cfscript> number = 255 ; number1 = 0 ; length =4 ; writeOutput(bitmaskclear(number, number1, length)) ; //Return 240 </cfscript>
<cfscript>
  number = 255 ;
  number1 = 0 ;
  length =4 ;
  writeOutput(bitmaskclear(number, number1, length)) ; //Return 240
</cfscript>

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