Advanced conditions and logic

When we work with conditional statements and logic operators…it's often necessary…to string multiple different conditions together,…and for that we have two logic operators called AND and OR.…These allow us to do things like say,…if "a" equals "b" and "c" equals "d"…or if "a" equals "b" or "c" equals "d".…For AND statements we use two ampersands…and for OR statements we use two vertical lines or pipes.…When using logical AND and logical OR…it's important to understand what logical AND…and logical OR actually mean…because it's not what it sounds like.…

This makes a lot more sense if we use a venn diagram.…In logic,…AND means both conditions must be true…for the whole statement to be true.…That makes sense.…OR means either the first statement…or the second statement or both statements are true.…Commonly, when we speak in human language…we would expect that OR means…either "a" or "b" but not both,…but in computer logic,…it actually means either "a" or "b" or both.…This leads to a third condition…where either "a" or "b" are true but not both.…