The DEC2BIN function converts a decimal number to binary.

DEC2BIN takes 1 required argument and 1 optional argument:

Syntax: DEC2BIN(number, [places])

#1)
Using the DEC2BIN function:
#2)
The arguments for the DEC2BIN function are:
Argument Required? Description
number Required The decimal integer you want to convert. If number is negative, places is ignored and DEC2BIN returns a 10-character (10-bit) binary number in which the most significant bit is the sign bit. The remaining 9 bits are magnitude bits. Negative numbers are represented using two's-complement notation. Negative numbers are represented using two's-complement notation.
places Optional The number of characters to use. If places is omitted, DEC2BIN uses the minimum number of characters necessary. places is useful for padding the return value with leading 0s (zeros).
#3)
A few more things:
If number < -512 or if number > 511, DEC2BIN returns the #NUM! error value.
If number is nonnumeric, DEC2BIN returns the #VALUE! error value.
If DEC2BIN requires more than places characters, it returns the #NUM! error value.
If places is not an integer, it is truncated.
If places is nonnumeric, DEC2BIN returns the #VALUE! error value.
If places is zero or negative, DEC2BIN returns the #NUM! error value.

Summary

The DEC2BIN function converts a decimal number to binary.
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