cs revision coding

random numbers

random numbers

random rnd = new random

int num = rnd.next(1,10);

for loops

for (int i = 1 ; i<= 10 ; i++)

{

}

boolean operators

and &&

or ||

not !

arrays

string[] countries = new string[3]

countries[0] = “a”

countries[1] = “b”

countries[2] = “c”

2d arrays

string[,] stationtimes = new string[,] {

{“ 7.30“ ,“ 8.30“,“12.45 “,“ 16.20“}',

{“ 7.30“ ,“ 8.30“,“12.45 “,“ 16.20“}'};

console.writeline(stationtimes[1,2]);

string manipulation-length of string

string mystring = “hello world“;

int lenofstring;

lenofstring = mystring.length;

record/structures

private struct employee

{
public string first name

public string surname

public string phone extension
}

static void main(string[] args)

{

employee1.firstname =”will”

employee1.surname = “smith”

employee1.phoneextention = “1701”

string manipulation-searching for character in a string

string email = “[e-mail]”;

string searchcharacter = “@”;

int position

position = email.IndexOf(searchcharacter);

console.writeline(position);

string manipulation- substring

string str;

string retstring;

str = “this is a substring test”;

retstring = str.substring(10,9);

consolee.writeline(retstring);

string conversion

string string1 = “2343”;

int string1convert = int.parse(string1)

console.writeline(“string1convert”)

string as an array of chars

string mystring = “hello world”;

for(int i = 0; i < mystring.length; i++)

{

console.writeline(mystring[i[);

}