Dart int modInverse()
Syntax & Examples

int.modInverse() method

The `modInverse` method in Dart returns the modular multiplicative inverse of this integer modulo the given modulus.

Syntax of int.modInverse()

The syntax of int.modInverse() method is:

 int modInverse(int modulus)

This modInverse() method of int returns the modular multiplicative inverse of this integer modulo modulus.

Parameters

ParameterOptional/RequiredDescription
modulusrequiredThe modulus value to compute the inverse.

Return Type

int.modInverse() returns value of type int.


✐ Examples

1 Compute modular multiplicative inverse

In this example,

  1. We create an integer variable num with the value 3 and a modulus variable with the value 11.
  2. We use the modInverse() method with the modulus as the argument to compute the modular multiplicative inverse.
  3. We then print the result to standard output.

Dart Program

void main() {
  int num = 3;
  int modulus = 11;
  int inverse = num.modInverse(modulus);
  print('Modular multiplicative inverse of $num modulo $modulus: $inverse');
}

Output

Modular multiplicative inverse of 3 modulo 11: 4

2 Compute modular multiplicative inverse

In this example,

  1. We create an integer variable num with the value 5 and a modulus variable with the value 12.
  2. We use the modInverse() method with the modulus as the argument to compute the modular multiplicative inverse.
  3. We then print the result to standard output.

Dart Program

void main() {
  int num = 5;
  int modulus = 12;
  int inverse = num.modInverse(modulus);
  print('Modular multiplicative inverse of $num modulo $modulus: $inverse');
}

Output

Modular multiplicative inverse of 5 modulo 12: 5

3 Compute modular multiplicative inverse

In this example,

  1. We create an integer variable num with the value 7 and a modulus variable with the value 10.
  2. We use the modInverse() method with the modulus as the argument to compute the modular multiplicative inverse.
  3. We then print the result to standard output.

Dart Program

void main() {
  int num = 7;
  int modulus = 10;
  int inverse = num.modInverse(modulus);
  print('Modular multiplicative inverse of $num modulo $modulus: $inverse');
}

Output

Modular multiplicative inverse of 7 modulo 10: 3

Summary

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