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Including return type in return value

 
Greenhorn
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Hello all,

I'm currently working through some examples in a book and came across the following method:



I can't find a reason why the author included the return type (double) in the value to be returned since double is already the return type, and the method works with or without it. The mpg variable is of type int, so is this just changing the type of both miles and mpg to double before division occurs?

Thanks
 
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cast has a higher precedence than division, so the cast is for the numerator, not the result.

 
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If one (or both) of the variables weren't cast to double, integer division would occur. So if mile = 1 and mpg = 2, without the cast fuelneeded() would return 0;
 
Ben Charles
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Understood. Thanks for the replies Knute and Bear!
 
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