An octal integer is `0' followed by zero or more of the octal digits (`01234567').
_as_octal = 0157255;
A decimal integer starts with a non-zero digit followed by zero or more digits (`0123456789').
_as_decimal = 57005;
A hexadecimal integer is `0x' or `0X' followed by one or more hexadecimal digits chosen from `0123456789abcdefABCDEF'.
_as_hex = 0xdead;
To write a negative integer, use the prefix operator `-' (see section Operators).
_as_neg = -57005;
Additionally the suffixes
M may be used to scale a
respectively. For example, the following all refer to the same quantity:
_fourk_1 = 4K; _fourk_2 = 4096; _fourk_3 = 0x1000;
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