The factorial of a number is the product of all the integers from 1 to that number.
For example, the factorial of 5 (denoted as 6!) is
1*2*3*4*5 = 120.
Factorial is not defined for negative numbers and the factorial of zero is one, 0! = 1
Factorial Example with Dart For Loop
void main() {
var num = 5;
var factorial = 1;
for( var i = num ; i >= 1; i-- ) {
factorial *= i ;
}
print(factorial);
}
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Output
120