public int FactorialLinq(int n) { return(FactorialEx.FactorialLinq(n)); }
public int FactorialFor(int n) { return(FactorialEx.FactorialFor(n)); }
public int FactorialWhile(int n) { return(FactorialEx.FactorialWhile(n)); }
public int FactorialRec(int n) { return(FactorialEx.FactorialRec(n)); }