# Documentation/Calc Functions/BITLSHIFT

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BITLSHIFT

Mathematical

## Summary:

Left shifts a non-negative integer value by the specified number of bits.

## Syntax:

BITLSHIFT(Number; Shift)

## Returns:

Returns a non-negative integer, that is the original number shifted by the specified number of bits.

## Arguments:

Number is an integer in the range [0, 248-1], or a reference to a cell containing that number, that is the value to be shifted.

Shift is an integer, or a reference to a cell containing that number, that is the number of bit positions to shift. If Shift is positive, then Number is shifted to the left. If Shift is negative, then Number is shifted to the right and this would be equivalent to BITRSHIFT(Number; -Shift).

• If either Number or Shift is non-numeric, then BITLSHIFT reports a #VALUE! error.
• If either Number or Shift is a non-integer value, then BITLSHIFT converts it to an integer by taking its floor value.
• If Number is less than 0 or greater than 248-1, then BITLSHIFT reports an invalid argument error (Err:502).

• A left shift by N (N > 0) is equivalent to multiplying by 2N and effectively adds zeros at the right end of the binary representation of the number.
• 248 is equal to 281474976710656.

## Examples:

Formula Description Returns
=BITLSHIFT(6; 3) 6 is binary 0110. The function shifts this value left by three bits, to give binary 0110000 or decimal 48. 48
=BITLSHIFT(D1; D2) where cells D1 and D2 contain the numbers 6 and -1 respectively. 6 is binary 0110. Because the Shift argument is negative, the function shifts the value 6 right by one bit, to give binary 0011 or decimal 3. 3
=BITLSHIFT(6.123; 3.9) The floor values of the two arguments are taken, giving 6 (binary 0110) and 3. The function shifts the value 6 left by three bits, to give binary 0110000 or decimal 48. 48

BITLSHIFT