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Decimal
255
Binary
11111111
Hexadecimal
FF
Octal
377
Large integers use BigInt. Prefixes 0b, 0x, and 0o are accepted.
Masks the value to N bits and shows unsigned and two's complement signed decimal.
Yes — hex, binary, and octal inputs accept 0x, 0b, and 0o prefixes.
JavaScript BigInt supports very large integers within practical browser limits.