Division is not working

I've got a variable:

int Result = 42 % 84;

However its returning null开发者_开发知识库 on NSLog?

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To NSLog an integer, use %d.

int result = 42 % 84;
NSLog(@"%d", result);

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int r=42%84;
NSLog(@"%d", r);

The above code logs 42 for me.

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How does it return null in NSLog? Did you write "%@"?