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# Converting an amount to a 4 byte array

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## Converting an amount to a 4 byte array

(OP)
I haven't ever had to deal with this before. I need to convert a sale amount (48.58) to a 4 byte array and use network byte order. The code below is how I am doing it, but it is wrong and I am not understanding why. Can anyone help?

float saleamount = 48.58F;
byte[] data2 = BitConverter.GetBytes(saleamount).Reverse().ToArray();

What I am getting is 66 66 81 236 in the array. I am not certain what it should be though. I am interfacing with a credit card terminal and need to send the amount in "4 bytes, fixed length, max value is 0xffffffff, use network byte order"

### RE: Converting an amount to a 4 byte array

The four bytes with decimal codes 66 66 81 236 (or hexadecimal 42 42 51 ec) are the raw byte values associated with the Real32 representation of the floating point value 48.58.

Your requirement of "4 bytes, fixed length, max value is 0xffffffff, use network byte order" perhaps implies that the amount should be the byte array representation of a long (32-bit) integer; so perhaps your mount multiplied by 100, giving 4858, which would be represented by the bytes with hexadecimal values 00 00 12 fa (decimal values 0 0 18 250).

### RE: Converting an amount to a 4 byte array

(OP)
That was it, thank you.

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