Why am i getting this warning?

Question

Here if i remove the p variable then it says p undeclared and if i keep it it says that it is never used.Why?
https://code.sololearn.com/c2Sv9ttP3242/?ref=app

Answer 1

you are using it in line 15, but not using this value anywhere. so you remove line 15 and decl of p, it will be fine

Answer 2

thanks,fixed it