Complete set: Intro to C - Bill Buchanan

2.2 Types
The language C# is strongly typed. This means that a compile time error occurs if
we make a type error.
Some basic types are:
Type Example Notes
int ‐100 32‐bit
char ‘x’ Uni‐code
string “Andrew was here.” Strings are double quoted.
Object new String(‘a’,10) Object is the most general type of object.
Variables are declared by giving the type followed by the name of the variable. In
these examples the variables are declared and given an initial value in the same line.
Sample program fragment
char c = 'x';
string s = "Andrew was here.";
int i = -100;
double d = 3.1415;
Object s = new System.IO.StreamReader("file.txt");
Object h = new System.Collections.Hashtable();
.
2.3 Type Casting
duction to .NET
Intro
A type cast can be used to convert one type to another.
The cast may be either explicit of implicit.
Sample program fragment
char c0 = 'A';
int i0 = c0; // Implicit cast works
//string s0 = c; // This fails
//string s1 = (string) c; // This fails
string s2 = "A" + c0; // This succeeds
double d0 = i0;
float f0 = (float)d0;
//float f1 = d0; // This fails
int i1 = (int)d0;
//int i1 = d0; // This fails
int i2 = (int)c0;
Agilent .NET Course: C# Basics 3