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Vic Mercier
3,276 Points|| operator
Can we use an or operator if we want to check if three values are true or it's just for two values?
2 Answers
james south
Front End Web Development Techdegree Graduate 33,271 Pointsyou can put as many as you want, like if a or b or c or d....would be true if any of a,b,c,d were true.
Lars Reimann
11,816 PointsThe || operator is a binary boolean operator. That's just a fancy way of saying that it takes two boolean values and merges them into one boolean value. Another binary operator you know is +. It takes two numbers and merges them into a new number. If you want to add three numbers, you just use + twice, like so: 1 + 2 + 3. You can either evaluate the left + first or the right + first, but you get the same result either way. The same is true for ||. If it is enough for you that one of three conditions is true, you just use || twice. And again it does not matter, if you evaluate the left one or the right one first.
Note that not all operators have this associative property. (1 - 2) - 3 is not the same as 1 - (2 - 3) for example. So use parenthesis if you are unsure.