Muiltiplaying with lists

Question

Hi Guys I was wondering if it was possible to multiply lists against list and lists against doubles. My program contains a list of randomly generated numbers(doubles) and several double values for instance double n = 12. which are collected from user input What im trying to do is not only muliply that n'th value with the list but with a selected value from the list. my random gen list code is as below double weightNo = numberHn * numberInput; if (weightNo for(double i = 1; i listBox4.DataSource = (inweight); just wondering if its possible even to multiply the value against each value in the list would be great. Hope someone can help! Cheers!

Vulpes · Answer

inweight.Count is an int and the argument to be passed to inweight[] is also an int so you should therefore use the int type rather than double. Don't be confused by the fact that inweight is a List of doubles. As a general rule it's not a good idea to use double (or float) as the loop variable type of a 'for' statement. This is because internally floating point numbers are not usually exact and you can get some strange errors if you rely on them being so. In contrast ints (and the other integral types) are exact and are also faster and use less memory than floating point numbers. Although I wouldn't recommend it you could make your approach work with: for (double i = 0; i

John · Answer

becuase i am using doubles i am doing the following for (double i; i getting too errors. 1 about converting double to int and 2 invalid statement

Vulpes · Answer

You can multiply each value in the list by 'n' as follows: for(int i = 0; i