Statement |
Example |
Statement lists and block statements |
static void Main() {
F();
G();
{
H();
I();
}
}
|
Labeled statements and goto statements |
static void Main(string[] args) {
if (args.Length == 0)
goto done;
Console.WriteLine(args.Length);
done:
Console.WriteLine("Done");
}
|
Local constant declarations |
static void Main() {
const float pi = 3.14f;
const int r = 123;
Console.WriteLine(pi * r * r);
}
|
Local variable declarations |
static void Main() {
int a;
int b = 2, c = 3;
a = 1;
Console.WriteLine(a + b + c);
}
|
Expression statements |
static int F(int a, int b) {
return a + b;
}
static void Main() {
F(1, 2); // Expression statement
}
|
if statements |
static void Main(string[] args) {
if (args.Length == 0)
Console.WriteLine("No args");
else
Console.WriteLine("Args");
}
|
switch statements |
static void Main(string[] args) {
switch (args.Length) {
case 0:
Console.WriteLine("No args");
break;
case 1:
Console.WriteLine("One arg");
break;
default:
int n = args.Length;
Console.WriteLine("{0} args", n);
break;
}
}
|
while statements |
static void Main(string[] args) {
int i = 0;
while (i < args.Length) {
Console.WriteLine(args[i]);
i++;
}
}
|
do statements |
static void Main() {
string s;
do { s = Console.ReadLine(); }
while (s != "Exit");
}
|
for statements |
static void Main(string[] args) {
for (int i = 0; i < args.Length; i++)
Console.WriteLine(args[i]);
}
|
foreach statements |
static void Main(string[] args) {
foreach (string s in args)
Console.WriteLine(s);
}
|
break statements |
static void Main(string[] args) {
int i = 0;
while (true) {
if (i == args.Length)
break;
Console.WriteLine(args[i++]);
}
}
|
continue statements |
static void Main(string[] args) {
int i = 0;
while (true) {
Console.WriteLine(args[i++]);
if (i < args.Length)
continue;
break;
}
}
|
return statements |
static int F(int a, int b) {
return a + b;
}
static void Main() {
Console.WriteLine(F(1, 2));
return;
}
|
throw statements and try statements |
static int F(int a, int b) {
if (b == 0)
throw new Exception("Divide by zero");
return a / b;
}
static void Main() {
try {
Console.WriteLine(F(5, 0));
}
catch(Exception e) {
Console.WriteLine("Error");
}
}
|
checked and unchecked statements |
static void Main() {
int x = Int32.MaxValue;
Console.WriteLine(x + 1); // Overflow
checked {
Console.WriteLine(x + 1); // Exception
}
unchecked {
Console.WriteLine(x + 1); // Overflow
}
}
|
lock statements |
static void Main() {
A a = ...;
lock(a) {
a.P = a.P + 1;
}
}
|
using statements |
static void Main() {
using (Resource r = new Resource()) {
r.F();
}
}
|