Reg: variable command

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1

I am trying to use the variable command in lammps. I read the manual. The manual says

*index* args = one or more strings

But when you look at in.lj in the bench mark example

variable x index 1

the index is not followed by a string. Can somebody please explain

Thanks
Arun

2

Everything is read in as strings then converted to other types if necessary.

Ray