What is the difference between %-8.5f and %8.5f in format specifiers in C

Answer 1

In %a.b
a is minimum number of characters including whole part, point and decimal part
b number of characters of decimal part

If total number of characters are less than a, it fills with blank spaces at the left side of number

With - sign it fills blank spaces at the right side of the number

Example:
printf("'%8.3f'",123.45);
' 123.450'
printf("'%-8.3f'",123.45);
'123.450 '

Answer 2

%8.5f is right-aligned, %-8.5f is left-aligned

Answer 3

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