### Conversion: atoi(), atof(), atol()

atoi(s[,base]) converts a string into an integer. The default is decimal, but you can specify octal 8, hexadecimal 16, or decimal 10. If 0 is the base, the string will be parsed as a hexadecimal if it has a leading 0x and as an octal if it has a leading 0. Otherwise, it will be treated as a decimal.

Let's do an example. In this and all other examples in this chapter, you have to first import the string module: from string import *.

Convert "1" to an integer.

```>>> atoi("1")
1
```

Convert "255" to a base 10 integer.

```>>> atoi("255",10)
255
```

Convert "FF" to a base 16 integer.

```>>> atoi("FF",16)
255
```

The atof(s) function converts a string to a float.

```>>> atof("1.1")
1.1
```

The atol(s[, base]) converts a string to a ...

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