While it's definitely a rarely-used feature, the equivalence a[b] == *(a + b) == b[a] is fundamental to pointer math. Once you grok pointer math, then this is

While it's definitely a rarely-used feature, the equivalence a[b] == *(a + b) == b[a] is fundamental to pointer math. Once you grok pointer math, then this is an interesting bit of syntax trivia and should not be forgotten easily.