Challenge for you...

[bplus]

A program for big factorials (not using strings). It was written to work with QB4.5

Code: (Select All)

DefInt A-S
mx = 32000
Dim f(mx) As Integer
Input "input number"; n
f(mx) = 1
m = mx
For i = 2 To n
    For j = mx To m Step -1
        f(j) = f(j) * i + ic
        ic = f(j) \ 10
        f(j) = f(j) Mod 10
    Next j
    While ic <> 0
        m = m - 1
        f(m) = f(m) + ic
        ic = f(m) \ 10
        f(m) = f(m) Mod 10
    Wend
Next i
For j = m To mx
    Print Using "#"; f(j);
Next j
Print " ="; n; "!"

Very interesting, I wonder if can take place of String Math or do more tricks with this.