Question

How to calculate factorial of a number in Dart

Answer 1

int factorial(int n) {
    int result = 1;
    
    for (int i = 1; i <= n; i++) {
        result *= i;
    }
    
    return result;
}
  
void main() {
    int result = factorial(5);
  
    print(result);
}
 
 
 
 
/*
run:
 
120
 
*/

 

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Answer 2

int factorial(int n) {
    return n == 1 ? 1 : n * factorial(n - 1);
}
  
void main() {
    int result = factorial(6);
  
    print(result);
}
 
 
 
 
/*
run:
 
5040
 
*/

 

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