Python 3 Grammar Note (1): Basic data type

1 Boolean

True and false are automatically converted to integers 1 and 0 under the arithmetic operator:

If the Boolean detection of the IF statement, encountered a non 0 is considered true, encountered 0 is considered false:

2 number

Number includes int and float, which can be converted to each other using float () and int ().

In Python 3, there is no concept of long, int is infinitely large and is not limited by Sys.maxint. The floating-point number can only be exactly 15 digits after the decimal point:

/= floating point except,//means integer except, * * is the second side,% is the remainder:

Fractions is a fractional library that can represent fractions:

Python 3 Grammar Note (1): Basic data type