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 r = n = 72;  d = 20;
/*  Initial pair of positive integers:   the dividend
    and the divisor of the Euclidean division.   The two variables
    n  and  r  have the same initial value,   because the instruction
    n = 72   returns  72  (of type Number).   And   n.toString(10)
    would return the dividend writing in decimal numeral system
    (of base 10).
*/

 n = " " + n +" modulo "+ d +" = ";
/*  The initial pair is stored in  n  as object  String.
 The space as first character of the string is of type  String.
 So the first sign  +  is a symbol of concatenation of strings
 of characters.   Variable  n  that follows is implicitly
 converted in   n.toString(10) :    one or several digits
 that come after the first space,  and before another space.
*/

 while( r >= d) r -= d;
/*  Loop :  calculation of the remainder of the division.
 With   r >= d   equivalent to   ! (r < d)   (the contrary of   r < d),
 and    r -= d   equivalent to   r = r-d
*/

 n + r ;
/*  Result of type  String,   where the decimal writing of remainder  r
   of the division comes after the previous value of  n.


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