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weak typing: 2 + "2" is 22

could also be "4" or 4! 4 seems like it would be the most evil option, honestly

The real evil option is C: 2+"22" = 0, 4+"4" = undefined behavior and probably the value of some other variable.

I think you meant: "22"+2 = "", and it is not UB to make the second pointer, only to use it

The pointer arithmetic works both ways, same as square brackets.

The real horror is "1d9" + 1 = 2, as does PHP: https://3v4l.org/Dn6Sm

or the most sane, depending on context... e.g. awk and perl do this.