[lammps-users] How to change the value of a variable?

Dear Lammps users,

How to change the value of a variable?
For example, if there is a definition,

variable a equal 10

and I want to change a to 20, how to do it?

Thanks

You can assign multiple values to some styles of variables
and use the "next" command to switch values. Or you
can use a new variable name. But you can't reassign
a new value to the same variable name. The doc
page for the variable command explains all this.

Steve