Question

how can i get a random number that has 10 digits in it using the random function. (The default number is 12, not sure how to change it to 10)

Answer 1

divide by 100

Answer 2

(assuming the random numbers are uniformly distributed integers)

Answer 3

Which language are you using?

Answer 4

im using muPAD

Answer 5

so do the numbers go from 0 to 10^12-1? In that case you could just divide by 100 or use modulo 10^10.

Answer 6

or you could just use the random function that takes the appropriate parameter; I'll leave that as an exercise:
http://www.mathworks.de/help/toolbox/mupad/stdlib/random.html