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Start your free trialLee Puckett
12,539 PointsI don't get how modulus works. In the example he says the modulus is one, but I don't see how he got that.
That's all
3 Answers
Andrew Trachtman
3,680 PointsThis confused me as well. The trick here is that everything is performed from left to right (It threw me off seeing 21%3 not return 0, but then I realized I was getting ahead of myself).
Let me break it down for you.
5 + 2 - ( (3*7) / 3 ) % 3
So we get that 3*7 = 21
5 + 2 - ( 21 / 3 ) % 3
21/3 = 7
5 + 2 - (7) % 3
7/3 = 2 with a remainder of 1. So 7%3 = 1
5 + 2 - 1
Final result:
7 - 1 = 6
I hope this helps clarify things.
Ramses Martinez
2,011 PointsYou can also see the model this way...
5 % 3
How many times does the 3 fit the 5?... 1, So
3 x 1 = 3
Now we search the difference (Residue)
5 - 3 = 2
therefore
5 % 3 = 2
Lee Puckett
12,539 PointsThanks! He didn't really explain it and since I had never done that operation before, I wasn't sure what I was suppose to be looking for.
Nicholas Rossi
5,066 PointsI was also very confused by the % operator, as I've never used it before. I would recommend TreeHouse might want to explain this operator a little more clearly. Ramses, your "How many times does x fit into y...?" really helped me out.
Jon Wood
9,884 PointsModulus is doing a division on the two numbers and it returns the remainder.
Lee Puckett
12,539 PointsLee Puckett
12,539 PointsThank you very much! I think he just left out some steps in instruction and that confused me.