by @kodeazy

flutter what is recursion and an example program on factorial of a number in dart?

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  • A function calling itself is called recursion.
  • A factorial of a number n means n*(n-1)*(n-2)*..*1.

  • Below is a sample example for creating factorial of a number using recursion.

    void main() {
int result = factorialUsingRecursion(5);
print('factorial is $result');
}
int factorialUsingRecursion(int number) {
if (number > 1)
return number * factorialUsingRecursion(number - 1);
else
return 1;
}

    Output:

    factorial is 120