CSharp - Write program to show the difference between int and long


You will write a program that tries to calculate a million times a million.


int type uses 4 bytes, or 32 bits of memory.

This means 2 to the 32nd power of possible values, which is more than 4 billion.

int is a signed type, so you have 2 billion for positive numbers and 2 billion for negative numbers.

Its unsigned counterpart uint has all 4 billion values for positive numbers and zero.

To help you understand various data types, here is a summary of when you should use each one:

Type Usage
int values that are integers, for example, to count something.
double values that may be decimal, values you do math with.
byte work with binary data.
long For big integer values
decimal A common choice for money amounts.

The other types are not used that often.

When program calculates a value that does not "fit" into an appropriate type's range, overflow will happen.


using System;
class Program{/*from w  w  w.ja v  a 2  s . c  o m*/
    static void Main(string[] args)
        // Multiplying million by million 
        int million = 1000000;
        int result = million * million;
        long resultInLong = million * million;

        // Outputs 
        Console.WriteLine("Million times million: " + result);
        Console.WriteLine("also in long: " + resultInLong);



The program multiplies a million by a million.

The result is too big for the 32-bit signed int type.