As conditional or control statements you have IF in many variants (but essentially not changed from Fortran 77), DO (with some new variants) and the completely new statement CASE . The DO- loop should now be ended with the statement END DO and we no longer need any statement number. In addition, we can use the statement EXIT to jump out of the DO -loop and CYCLE in order to go to the next iteration of the present DO -loop. ... all negative numbers WRITE (*,*) 'Negative number' CASE (0) ! ...

... While Sfit accepts input from "stdio", it is more natural to save/edit commands in a file (eg "solve_input.sfit") and run the code simply by entering > Sfit solve_input.sfit [linelist] . ... The model grid (3.4MB) produced by Example 1 and a selection of input spectra ( f008 f036 f068 f304 f354 ), together with SFIT output files are also given in this folder . ... The model grid (2.8MB) produced by Example 3 and an input spectrum together with SFIT output files are also given in this folder . ...

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