Dart BigInt toUnsigned()
Syntax & Examples

BigInt.toUnsigned() method

The `toUnsigned()` method of BigInt class returns the least significant `width` bits of this BigInt as a non-negative number.

Syntax of BigInt.toUnsigned()

The syntax of BigInt.toUnsigned() method is:

 BigInt toUnsigned(int width)

This toUnsigned() method of BigInt returns the least significant width bits of this big integer as a non-negative number (i.e. unsigned representation). The returned value has zeros in all bit positions higher than width.

Parameters

ParameterOptional/RequiredDescription
widthrequiredthe number of bits to retain

Return Type

BigInt.toUnsigned() returns value of type BigInt.


✐ Examples

1 Convert BigInt to unsigned value with 64 bits

In this example,

  1. We create a BigInt bigInt with a large value.
  2. We use the toUnsigned() method to convert it to an unsigned value with 64 bits.
  3. We print the unsigned value to standard output.

Dart Program

void main() {
  BigInt bigInt = BigInt.parse('-12345678901234567890');
  BigInt unsignedValue = bigInt.toUnsigned(64);
  print('Unsigned value with 64 bits: $unsignedValue');
}

Output

Unsigned value with 64 bits: 6101065172474983726

2 Convert BigInt to unsigned value with 32 bits

In this example,

  1. We create a BigInt bigInt with a large negative value.
  2. We use the toUnsigned() method to convert it to an unsigned value with 32 bits.
  3. We print the unsigned value to standard output.

Dart Program

void main() {
  BigInt bigInt = BigInt.parse('-98765432109876543210');
  BigInt unsignedValue = bigInt.toUnsigned(32);
  print('Unsigned value with 32 bits: $unsignedValue');
}

Output

Unsigned value with 32 bits: 450461974

Summary

In this Dart tutorial, we learned about toUnsigned() method of BigInt: the syntax and few working examples with output and detailed explanation for each example.