How can I make Java print a double variable ( discount
) inside of parentheses -eg- (42.00% of your purchase)
?
When I type System.out.println(discount + "(% of your purchase)");
the output does not include the variable that discount
holds inside of the parentheses. It outputs 42.00(% of your purchase)
.
System.out.printf("(%.2f%% of your purchase)\n", discount);
Using String formats will help you include the variable in the string, but also format it with how many decimals you want.
In this case %%
is a literal percent sign
%.2f
means print the floating number with 2 decimal places.
(If you want more information on String formatting see the official spec here https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Formatter.html#syntax or search around for a Java String Format Tutorial)
System.out.println("(" + discount + "% of your purchase)");
System.out.printf("(%f%% of your purchase)", discount);
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