[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'Classes' (#rtl)

# TBits.FindFirstBit

Find first bit with a particular value

## Declaration

Source position: classesh.inc line 415

`public function TBits.FindFirstBit(`
`State: Boolean`
`):LongInt;`

## Description

FindFirstBit searches for the first bit with value State. It returns the position of this bit, or -1 if no such bit was found.

The search starts at position 0 in the array. If the first search returned a positive result, the found position is saved, and the FindNextBit and FindPrevBit will use this position to resume the search. To start a search from a certain position, the start position can be set with the SetIndex instead.

## Errors

None.

## See also

FindNextBit |  | Searches the next bit with a particular value.
FindPrevBit |  | Searches the previous bit with a particular value.
OpenBit |  | Returns the position of the first bit that is set to False.
SetIndex |  | Sets the start position for FindNextBit and FindPrevBit