2. Built-in Data Types

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• For these operations, arithmetic is as usual,except for the symbols used and somesize/accuracy issues• Examples2*3 + 5*6 gives the answer 3664/2 – 5*7 gives the answer -32.3 * 4.2 gives 9.6600000000000001(inaccuracy after 15 th decimal place)2147483645 + 10 gives 2147483655L(the largest int that can be stored is 2147483647, so thelast result is converted automatically to long)Note that you are not permitted to use commas28
• Even in ordinary arithmetic, integer division ofintegers differs from decimal division• Example: 11 ÷ 3 gives quotient 3 with remainder 2 forinteger division, or 3.666666666666666… (“forever”)for decimal (“long”) division• In Python, if we want an integer result we muststart with two integers: 11/3 gives 3• For the remainder, use the symbol % (weird!)11%3 gives 2• If at least one of the numbers is a decimal (typefloat), you get a decimal answer11.0/3 and 11/3.0 both give (note theinaccuracy of the answer) 3.666666666666666529
Page 1 and 2: Department of Computer ScienceDr. J
Page 3 and 4: • Each bit is either 0 or 1, so i
Page 5 and 6: • Data such as sound (e.g., music
Page 7 and 8: • The symbol used to write a numb
Page 9 and 10: • Base 10 probably arose because
Page 11 and 12: • We are used to writing numbers
Page 13 and 14: • The algorithms you learned for
Page 15 and 16: • From another base to decimal is
Page 17 and 18: • Different kinds of numbers• P
Page 19: • For efficiency, Python uses a s
Page 22 and 23: • Idea is to trade accuracy for r
Page 24 and 25: • Python uses a storage scheme wi
Page 26 and 27: • Differences• Addition, subtra
Page 30: • In math, we use superscripts to
Page 33 and 34: • Basics• Naming variables• A
Page 35 and 36: • The name of a variable must be
Page 37 and 38: • The print statement distinguish
Page 39 and 40: • We often want to increase the v

2. Built-in Data Types

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