Case conversion is used for translating expressions to lower case in C (see section ). Also, certain FORTRAN compilers (specifically MSDOS) require that all characters be specified in upper case.
In[4]:= FortranAssign[y,Sin[2 Cos[x + Log[y]]],AssignCase->Upper] Out[4]//OutputForm= Y=SIN(2.D0*COS(X+LOG(Y)))