How do I format the input with scanf?

Question

Whats rhe meaning of “%10f”

Answer 1

10 is the width specification: the max number of chars to consider.

https://code.sololearn.com/cmasjZhAbrd7/?ref=app

In your case if you digit 0000000009 (nine zeroes) the value of a will be 9.0 but if you input 00000000009 (ten zeroes) the value of a will be 0.0