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set option flag in function definition
Dear Experts, I had one question regarding to the function definition. I want to have a function that executes certain operation when I chose the corresponding option flag. For example, a function called "f" when I call it like f[arg1,arg2,arg3, optionX] it executes command arg1/arg2+arg3 If I call it like f[arg1,arg2,arg3,optionY] it executes command arg1*arg2-arg3 If I call it like f[arg1,arg2,arg3,optionSomethingElse] it returns me "No appropriate option flag was found. Please indicate correct options" This looks a bit like scripts running in UNIX. I am wondering if I can do the same in Mathematica easily? Thank you so much for your kind help!