That is when the output to %. 12 e is what mean?

CodePudding user response:

%. 12 retain 12 decimal places
E scientific notation
% 12.2 length is 12, and keep two decimal places

CodePudding user response:

Retain 12 decimals, e science count

CodePudding user response:

I hope it can help you: https://blog.csdn.net/it_xiangqiang/category_10581430.html
I hope it can help you: https://blog.csdn.net/it_xiangqiang/category_10768339.html