Non-decimal radices/Input: Difference between revisions

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The solutions may assume that the base of the number in the string is known. In particular, if your language has a facility to guess the base of a number by looking at a prefix (e.g. "0x" for hexadecimal) or other distinguishing syntax as it parses it, please show that.

The reverse operation is in task [[~~Common~~ ~~number base formatting~~]]

The reverse operation is in task [[Non-decimal radices/Output]]

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For general number base conversion, see [[Non-decimal radices/Convert]].

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For general number base conversion, see [[~~Number~~ ~~base conversion~~]].

=={{header|Ada}}==

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? __makeInt("200", 10)

# value: 200</lang>

=={{header|Elixir}}==

base: 2 .. 36

<lang elixir>iex(1)> String.to_integer("1000")

1000

iex(2)> String.to_integer("1000",2)

8

iex(3)> String.to_integer("1000",8)

512

iex(4)> String.to_integer("1000",16)

4096

iex(5)> String.to_integer("ffff",16)

65535</lang>

=={{header|Erlang}}==

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= {String.toInt "052"} %% octal

= {String.toInt "0b101010"} %% binary</lang>

=={{header|PARI/GP}}==

Binary conversion is built in to PARI/GP, this script can convert from bases2-36 to bases 2-36. I've had help with this script at http:\\mersenneforums.org . The main flaw in this script I see is that it doesn't allow 36^x-1 type strings, I'll have to add that on later.