BigInt class abstract final

An arbitrarily large integer value.

Big integers are signed and can have an arbitrary number of significant digits, only limited by memory.

To create a big integer from the provided number, use BigInt.from.

var bigInteger = BigInt.from(-1); // -1
bigInteger = BigInt.from(0.9999); // 0
bigInteger = BigInt.from(-10.99); // -10
bigInteger = BigInt.from(0x7FFFFFFFFFFFFFFF); // 9223372036854775807
bigInteger = BigInt.from(1e+30); // 1000000000000000019884624838656

To parse a large integer value from a string, use parse or tryParse.

var value = BigInt.parse('0x1ffffffffffffffff'); // 36893488147419103231
value = BigInt.parse('12345678901234567890'); // 12345678901234567890

To check whether a big integer can be represented as an int without losing precision, use isValidInt.

print(bigNumber.isValidInt); // false

To convert a big integer into an int, use toInt. To convert a big integer into an double, use toDouble.

var bigValue = BigInt.from(10).pow(3);
print(bigValue.isValidInt); // true
print(bigValue.toInt()); // 1000
print(bigValue.toDouble()); // 1000.0

See also:

• int: An integer number.
• double: A double-precision floating point number.
• num: The super class for int and double.
• Numbers in A tour of the Dart language.