How do I format my percent variable to 2 decimal places?

Question

This program is basically working with text files, reading the data & performing functions:

while(s.hasNext()){
    name= s.next();

    mark= s.nextDouble()         


        

Answer 1

You could use formatted output like,

System.out.printf("Percentage In Exam: %.2f%%%n", percent);

The Formatter syntax describes precision as

Precision

For general argument types, the precision is the maximum number of characters to be written to the output.

For the floating-point conversions 'e', 'E', and 'f' the precision is the number of digits after the decimal separator. If the conversion is 'g' or 'G', then the precision is the total number of digits in the resulting magnitude after rounding. If the conversion is 'a' or 'A', then the precision must not be specified.

The double percent %% becomes a percent literal, and the %n is a newline.