SHL Function

SHL(value, count)

Performs a bitwise shift left operation on an integer. The first parameter is the value to shift, the second is the number of bit positions.

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Examples

PRINT SHL(1, 1)

Produces 2 (0001 → 0010).

PRINT SHL(3, 2)

Produces 12 (0011 → 1100).

REM Multiply by powers of two using SHL
n = 7
PRINT SHL(n, 3)   ' Same as 7 * 8 = 56

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Notes

• Operates on 64-bit integers.
• Shifting left by n positions is equivalent to multiplying by 2^n.
• Bits shifted out on the left are discarded; new bits on the right are filled with zero.
• If the shift count is negative or larger than the bit width, behaviour is undefined.

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See also: SHR · BITAND · BITOR · BITNAND