What is mantissa in logarithm?

Hello Student,

Its not a round off!!!!.
To avoid the need for separate tables to convert positive and negative logarithms back to their original numbers, a bar notation is used. The bar over the characteristic indicates that it is negative whilst the mantissa remains positive.

eg.

-(12-0.4941)=-11.5059

Thanks & Regards
Arun Kumar
Btech, IIT Delhi
Askiitians Faculty