percentage of two int

Question

I want to get two ints  one divided by the other to get a decimal or percentage  How can I get a percentage or decimal of these two ints   I m not sure if it is right   I m probably way off     for example   int correct   25  int questionNum   100  float percent   correct questionNum  100    This is how I thought I could do it  but it didn t work    I want to make the decimal  if there is one  into a percent out of 100 for example in this case it is  25  any ideas anyone   Here is the correct code  thanks to Salvatore Previti     float correct   25  float questionNum   100  float percent    correct   100 0f    questionNum     btw  I am making a project using this for a quiz checking program that is why I need the percentage or decimal

User · Answer

Well to make the decimal into a percent you can do this   float percentage    correct   100 0f    questionNum

User · Answer

If you don t add  0f it will be treated like it is an integer  and an integer division is a lot different from a floating point division indeed     float percent    n   100 0f    v    If you need an integer out of this you can of course cast the float or the double again in integer   int percent    int   n   100 0f    v     If you know your n value is less than 21474836  that is  2   31   100    you can do all using integer operations   int percent    n   100    v    If you get NaN is because wathever you do you cannot divide for zero of course    it doesn t make sense

User · Answer

One of them has to be a float going in  One possible way of ensuring that is   float percent    float  n v   100    Otherwise  you re doing integer division  which truncates the numbers  Also  you should be using double unless there s a good reason for the float   The next issue you ll run into is that some of your percentages might look like 24 9999999999999  instead of 25   This is due to precision loss in floating point representation  You ll have to decide how to deal with that  too  Options include a DecimalFormat to  fix  the formatting or BigDecimal to represent exact values

User · Answer

float percent    n    v   1 0f    100

User · Answer

Two options   Do the division after the multiplication   int n   25  int v   100  int percent   n   100   v    Convert an int to a float before dividing  int n   25  int v   100  float percent   n   100f   v    Or      float percent    float  n   100   v      float percent   n   100    float  v

[java] percentage of two int?

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