Numbers and Strings

Introduction to numbers

There are several different kinds of numbers in Python. The following describes all of these:

• A decimal integer consists of either the number 0 or a sequence of digits not beginning with 0.
• A binary integer consists of binary digits (0, 1), beginning with 0b or 0B.
• An octal integer consists of a sequence of octal digits (0 to 7), beginning with 0o or 0O.
• A hexadecimal integer consists of a sequence of hex digits (0 to 9 and a to f or A to F), beginning with 0x or 0X.
• A floating-point (“real”) number includes a decimal point, an exponent suffix, or both. The exponent consists of an optional sign, the letter e or E, and one or more digits.
• An imaginary number consists of a decimal integer or a floating-point number, and it is suffixed by j (not

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