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Greenhorn
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Which three are valid declarations of a float? (Choose Three)
A. Float foo = -1;
B. Float foo = 1.0;
C. Float foo = 42e1;
D. Float foo = 2.02f;
E. Float foo = 3.03d;
F. Float foo = 0x0123;

The answer is ADF

1.why choose A? i'm confused
2.why the F is correct? i think the default is double type, how about in the hex situation

Thank you in advance!
 
Ranch Hand
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the hex value 0x0123 will be converted to int and int can be converted to float using widening primitive convertion. same is the case of first alternative.
 
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As int and float both are of 4 byte. Then how can int be widen to float....
 
bnkiran kumar
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there is a loss of information if we convert from float to int where as this is not the case when we assign int to float. so it is primitive widening convertion.
 
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