Variable Types in MQL programming language

In MQL programming language, in variables, constants and functions following variable types are used.

int (integer) – It can only get integer values. 

int Art = 10;           // Integer variable sample

int B_27 = -1;          // Integer variable sample

int Num = 21;           // Integer variable sample

int Max = 2147483647;   // Integer variable sample

int Min = -2147483648;  // Integer variable sample

double (real number) – It is the type that decimal numbers can be define as.

double Art = 10.123;        // Real number variable sample

double B_27 = -1.0;         // Real number variable sample

double Num = 0.5;           // Real number variable sample

double MMM = -12.07;        // Real number variable sample

double Price_1 = 1.2756;    // Real number variable sample

bool (logic variable) – It is the variable that contains only true or false logic values

bool aa = True;     // Logic variable sample

bool B17 = TRUE;    // Logic variable sample

bool Hamma = 1;     // Logic variable sample

bool Asd = False;   // Logic variable sample

bool Nol = FALSE;   // Logic variable sample

bool Prim = 0;      // Logic variable sample

string (text) – It is the variable that contains text

string Prefix = "MetaTrader 4";             // String text variable

string Postfix = "_of_my_progr. OK";        // String text variable

string Name_Mass = "History";               // String text variable

string text = "Upper Line\nLower Line";     // String text variable new line character

color (color) – It is the variable that contains color

color Paint_1 = C'128,128,128';    // Gray color variable sample

color Colo = C'0x00,0x00,0xFF';    // Blue color variable sample

color BMP_4 = C'0xFF,0x33,0x00'    // Red color variable sample

color K_12 = 0xFF3300;             // Red color variable sample

color N_3 = 0x008000;              // Green color variable sample

color Color = 16777215;            // White color variable sample

color Alfa = 32768;                // Green color variable sample

color A = Red;                     // Red color variable sample

color B = Yellow;                  // Yellow color variable sample

color Colorit = Black;             // Black color variable sample

color B_21 = White;                // White color variable sample

datetime (date time) – It is the variable that contains date and time information

datetime Alfa = D'2004.01.01 00:00';      // New year

datetime Tim = D'01.01.2004';             // New year

datetime Tims = D'2005.05.12 16:30:45';   // May 12, 2005 16:30:45

datetime N_3 = D'12.05.2005 16:30:45';    // May 12, 2005 16:30:45

datetime Compile = D'';                   // Compile date D'[compilation date] 00:00:00'