st: Program and local macro

[<alvine.bissery@chu-lyon.fr>]

Dear all, 

I'm a beginner in Stata programming.
I don't understand why this syntax is invalid

 forvalues i=2/4 {
  2. forvalues j=1/nb_exam[`i'] {
  3. dis nb_exam[`j'] 
  4. }
  5. }
invalid syntax

I have tried 

 forvalues i=2/4 {
  2. forvalues j=1/`nb_exam[`i']' {
  3. dis nb_exam[`j'] 
  4. }
  5. }
invalid syntax

It's not better.

Can someone explain me ?

Thank you


Alvine 


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