BigInt.asUintN static method clamps a
BigInt value to the given number of bits, and returns that value as an unsigned integer.
The amount of bits available for the integer size.
The BigInt value to clamp to fit into the supplied bits.
The value of
bigint modulo 2^
bits, as an unsigned integer.
BigInt.asUintN method clamps a
BigInt value to the given number of bits, and interprets the result as an unsigned integer. Unsigned integers have no sign bits and are always non-negative. For example, for
BigInt.asUintN(4, 25n), the value
25n is clamped to
25n = 00011001 (base 2) ^==== Clamp to four remaining bits ===> 1001 (base 2) = 9n
BigInt values are always encoded as two's complement in binary.
BigInt.asUintN() method can be useful to stay in the range of 64-bit arithmetic.
const max = 2n ** 64n - 1n; BigInt.asUintN(64, max); // ↪ 18446744073709551615n BigInt.asUintN(64, max + 1n); // ↪ 0n // zero because of overflow: the lowest 64 bits are all zeros
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