Many of users do not use powerful Maxima computer algebra system for systematic work, but for ad hoc algebraic calculations – equations, functions, matrixes, etc. only.
To do this job, it is not useful to download the whole application from a web site.
Function: sposition (<char>, <string>) Returns the position of the first character in <string> which matches <char>. The first character in <string> is in position 1. For matching characters ignoring case see ssearch.