All integral types may be converted to float-point type variable.
using System;
class Program
{
static void Main(string[] args)
{
int i = 5;
float f = i;
Console.WriteLine(i);
Console.WriteLine(f);
}
}
The output:
5
5
When converting a large-size type to a small-size type you can use the implicit conversion.
The following code converts an int type variable to a long type variable.
long type is larger than the int type, so the conversion is implicit.
using System;
class Program
{
static void Main(string[] args)
{
int i = 5;
long l = i;
Console.WriteLine(i);
Console.WriteLine(l);
}
}
The double type is larger than the float type.
using System;
class Program
{
static void Main(string[] args)
{
int i = 5;
long l = i;
Console.WriteLine(i);
Console.WriteLine(l);
}
}
You have to do the explicit conversion by adding a cast during an information-may-lost conversion.
The following code convert a long type variable to an int type variable.
The information contained in the long type variable may get lost during the conversion, so a cast is needed.
using System;
class Program
{
static void Main(string[] args)
{
long l = 999999999999999999L;
int i = (int)l;
Console.WriteLine(l);
Console.WriteLine(i);
}
}
The output:
999999999999999999
-1486618625