C# 6 and .NET Core 1.0: Modern Cross-Platform Development

Casting and converting between types

You will often need to convert between different types.

Add a new Console Application project named Ch03_CastingConverting.

Casting from numbers to numbers

It is safe to implicitly cast an int variable into a double variable.

In the Main method, enter the following statements:

int a = 10;
double b = a;
WriteLine(b);

You cannot implicitly cast a double variable into an int variable because it is potentially unsafe and would lose data.

In the Main method, enter the following statements:

double c = 9.8;
int d = c; // compiler gives an error for this line
WriteLine(d);

Press Ctrl + W, E to view the Error List, as shown in the following screenshot:

You must explicitly cast a double into an int variable using a pair of round ...