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Almost everybody has answered: "do you need to know math to be a good programmer?" The correct answer to this is: "No, not really, but it helps," as many have already said.

But my interpretation of the question is "is there a strong correlation between mathematical aptitude and programming aptitude?" The correct answer to this is: "Yes, there is." If you struggle through algebra, geometry, and calculus, then you probably aren't very good at dealing with abstractions and/or thinking logically. If you're bad at math, you probably won't ever be a great programmer. (Not that you shouldn't try.)