Lecture 4 Notes

# Lecture 4 Notes - CS101 Lecture 4 How a computer thinks Or...

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CS101 Lecture 4 How a computer thinks: Or calm down its only ones and zeros

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What do you think when you see.. 101? One hundred and one What does a computer think when it sees 101? Five
Computers are Binary Creatures Binary means two Computers can only use 0’s and 1’s, or two numbers Computers use the base two, or binary, number system To understand a computer, we need to understand the base two number system To understand base two, start by reviewing the base 10 number system

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Review base 10 number system Can only use numbers 0-9 in base ten system 10 different numbers allowed in a column in a base 10 system Columns have place value You start with the one’s column To find the next column to the left multiply the current column by 10. …, thousands, hundreds, tens, ones Largest number you can make using a given number of columns is one less than the next column to the left.
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