BITLSHIFT function

BITLSHIFT function



This article describes the formula syntax and usage of the BITLSHIFT function in Microsoft Excel.



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



Syntax BITLSHIFT(number, shift_amount) The BITLSHIFT function syntax has the following arguments.

• Number Required. Number must be an integer greater than or equal to 0.
• Shift_amount Required. Shift_amount must be an integer.

Remarks

Shifting a number left is equivalent to adding zeros (0) to the right of the binary representation of the number. For example, a 2-bit shift to the left on the decimal value 4 converts its binary value (100) to 10000, or 16 in decimal.

• If either argument is outside their constraints, BITLSHIFT returns the #NUM! error value.
• If Number is greater than (2^48)-1, BITLSHIFT returns the #NUM! error value.
• If the absolute value of Shift_amount is greater than 53, BITLSHIFT returns the #NUM! error value.
• If either argument is a non-numeric value, BITLSHIFT returns the #VALUE! error value.
• A negative number used as the Shift_amount argument shifts the number of bits to the right.
• A negative number used as the Shift_amount argument returns the same result as a positive shift_amount argument for the BITRSHIFT function.

Example Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.



How is it Calculated ?



21 in binary is 0010101

Moving it twice to the left we get : 1010100

Decimal value of :1010100 is 84