How to use suffix in the name of a variable?

[Shafia Zahin]

t=a+(n-1)*d and t=a+(i-1)*d
I want to use the suffix "n" in the name of the first t
and suffix"i" in the name of the second t.How can I?

[weaknessforcats]

Do you mean tn and ti?

Use two variables tn and ti.

The compiler is not allowed to change the code it is compiling.