Question

Assume the following variable declaration exists in a program:

double number = 123456.789;
What format specifier should be inserted in the statement below to display the value of the number variable left-justified, with comma separators, in a field that is 20 spaces wide, rounded to two decimal places?


System.out.printf("_______", number);
A. %,-20.2f
B. %,20.2f
C. %-20,.2f
D. %,20.2lf

Please select the correct format specifier to fill in the blank in the statement above.

Answer 1

The correct format specifier for the printf statement is %,-20.2f, which ensures left alignment, comma separators, a width of 20 spaces, and two decimal place precision.

Step-by-step explanation:

The correct format specifier needed to display the value of the number variable left-justified, with comma separators, in a field that is 20 spaces wide, rounded to two decimal places, is %,-20.2f. The comma (,) is used to include the comma separators. The minus sign (-) indicates left justification, the 20 specifies the width of the field, and the .2f indicates that the number should be a floating-point number rounded to two decimal places.