2. Built-in Data Types

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• Using a + sign between strings causes the strings tobe concatenated (chained together)• Unlike the case with print, you must put in blankspaces yourself• You can also concatenate numbers to strings, butyou must tell Python to treat the number as astring, using str38
• We often want to increase the value of a variableby some amount, e.g., 1• More precisely, we want to replace the value to which avariable refers by one more than that value• This is called incrementing the variable• We do this by using an odd-looking assignmentstatement, in which the variable appears on bothsides of =• Examples:39
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 28 and 29: • For these operations, arithmeti
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: • The print statement distinguish

2. Built-in Data Types

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