# Documentation/Calc Functions/BITLSHIFT

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## Function name:

BITLSHIFT

## Category:

Mathematical

## Summary:

Shifts a number left by the specified number of bits.

## Syntax:

BITLSHIFT(**Number**; **Shift**)

## Returns:

Returns a number shifted left by the specified number of bits.

## Arguments:

**Number** is a positive integer less than 2 ^ 48 (281,474,976,710,656).

**Shift** is the number of positions the bits will be moved to the left. If shift is negative, it is synonymous with BITRSHIFT (**Number**; -**Shift**).

- If either argument is a decimal number then its floor value is considered.
- If
**Number**is negative, the function returns an error value.

## Additional details:

- Shifting a number left is equivalent to adding zeros (0) to the right of the binary representation of the number. For example, a 3-bit shift to the left on the decimal value 6 converts its binary value (0110) to 0110000, or 48 in decimal.
- Using a negative number as the
**Shift**argument shifts the number of bits to the right. Hence it will return the same result as a positive**Shift**argument for the BITRSHIFT function.

## Examples:

Formula | Description | Returns |
---|---|---|

=BITLSHIFT(6;3) | 6 in binary is 0110 which when applied with left shift by 3-bit gives 0110000 or (0110 << 3 = 0110000) | 48 (0110000) |

=BITLSHIFT(6;-1) | 6 in binary is 0110 which when applied with left shift by -1-bit gives 0011 which is equivalent to right shift by 1-bit or (0110 << -1 = 0011) | 3 (0011) |

=BITLSHIFT(6.123;3) | floor of 6.123 is taken so 6 in binary is 0110 which when applied with left shift by 3-bit gives 0110000 or (0110 << 3 = 0110000) | 48 (0110000) |

=BITLSHIFT(6;3.6) | 6 in binary is 0110 which when applied with left shift by 3-bit(floor of 3.6 is considered) gives 0110000 or (0110 << 3 = 0110000) | 48 (0110000) |

=BITLSHIFT(-6;3) | Number is negative so function returns error value |
Err:502 |

## Related LibreOffice functions:

## ODF standard:

## Equivalent Excel functions:

BITLSHIFT