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Okay.. so here's an easy one for you. How can I represent -4 in bits. Any good rule of thumb would be great so its easy to remember how to do it later. I understand the positive 4. Thats easy. 0100 Thanks -Dale ------------------ What's this H2SO4 doing in my fridge?? ( thud )

By failing to prepare, you are preparing to fail.<br />Benjamin Franklin (1706 - 1790)

Dale To find the negative value of a number you use the twos compliment: 1. take the positive number and flip all the bits (turn 1's into 0's and 0's into 1) 2. add 1 to the result so for your example of -4 4 is 00000000 00000000 00000000 00000100 flip the bits 1111111 11111111 11111111 11111011 add 1 1111111 11111111 11111111 11111100 this is -4 in binary.

hope that helps Dave

Dave

Dale DeMott
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Joined: Nov 02, 2000
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Thanks Dale

------------------ What's this H2SO4 doing in my fridge?? ( thud )