%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   persistance FUNCTION   %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function persistance (number, pers : int) : int %input the two digit number less than 100                                                                                 
    var pproduct : int := number %repeats procedure of multiplying 2 digits for each product                                                                                                    
    var ten : int                                                                                                          
    var pnum : int                                                                                                     
    var one : int := 0

    test := number                                                                                          
    loop                                                                                                                   
        exit when test < 10 %stops when value of test is less than ten (equals value of 1st digit)                                                                                                   
        count += 1 %remainder is value of 2nd digit                                                                                                        
        test -= 10 %detemines value of 1st digit by subtracting value of number by ten                                                                                                 
    end loop                                                                                                               

    pproduct := test * count %multiplies 1st and 2nd digit by each other
    pnum := pers + 1
    
    if pproduct < 10 then
        result pnum
    elsif pproduct > 9 then
        result persistance (pproduct, pnum)
    end if

end persistance

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     MAINLINE     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

var input : int
put "Enter digits of two digit number singularly." % user inputs value for number
get input
put "The persistance number is ", persistance (input, 0),"."