I have been trying to print this out:
System.out.println("Year " + (2021 + j) + " you can buy " + ((int)(budget / total)) + " " +
itemName + "s");
I'm supposed to only print out 2 decimals spaces and it's printing out many more than that. How can I fix this?
Have a look at this website about string format specifiers. What you can do is use the String.format function, which returns a String and will let you specify how many decimal places you want to print out. In your case, that might look like:
String outputString = String.format("Year %d you can buy %.2f %ss", (2021 + j), (budget / total), itemName);
System.out.println(outputString);
The %.2f indicates that the corresponding argument should be printed as a floating point number and be rounded to two decimal places.
If you are familiar with printf you can use it instead of println.
Otherwise there is a method called format() for Java Strings. A generic example to get the idea:
double value = 2/3.0;
System.out.println("Original: " + value);
System.out.println(String.format("Formatted: %.2f", value));
For your situation the formatting would look something like this:
System.out.println("Year " + (2021 + j) + " you can buy " + String.format("%.2f", budget/total) + " " + itemName + "s");
%.Nf keeps N decimals of a double value. That's why i removed the int typecast and assumed either budget or total variable will be type of double so the division returns a double value. If neither of those is double, int/int will return int value causing format() to throw and Exception because it expects double type value as second arguement since first argument had f in the way to format.
Here you can find more detailed information for the number formatting topic.
I haven't used java but you could do something like this
public class Main {
public static void main(String[] args) {
float a = 30;
float b = 6.5f;
float answer1 = a / b;
//Value is 4.6153846
System.out.println(answer1);
float answer2 = (float) (Math.floor((a / b) * 100)) / 100;
//Multiplied 4.6153846 by 100 to 461.53846
//Floored it to 461
//Then divided it by 100
System.out.println(answer2);
}
}
Console:
4.6153846
4.61
