What is the difference between %0.2lf and %.2lf as printf placeholders?

Question

I am aware that putting any number of 0\'s before the width of the placeholder implements zero-padding. For example, printf(\"%02d\", 6); prints

Answer 1

%3.2f //(print as a floating point at least 3 wide and a precision of 2)

%0.2lf //(print as a floating point at least 0 wide and a precision of 2)

%.2lf //(print as a floating point at least 0(default) wide and a precision of 2)