MQL4 Reference Conversion Functions

Conversion Functions

This is a group of functions that provide conversion of data from one format into another.

The NormalizeDouble() function must be specially noted as it provides the necessary accuracy of the price presentation. In trading operations, no unnormalized prices may be used if their accuracy even a digit exceeds that required by the trade server.

Function	Action
CharToString	Converting a symbol code into a one-character string
DoubleToString	Converting a numeric value to a text line with a specified accuracy
EnumToString	Converting an enumeration value of any type to string
NormalizeDouble	Rounding of a floating point number to a specified accuracy
StringToDouble	Converting a string containing a symbol representation of number into number of double type
StringToInteger	Converting a string containing a symbol representation of number into number of int type
StringToTime	Converting a string containing time or date in "yyyy.mm.dd [hh:mi]" format into datetime type
TimeToString	Converting a value containing time in seconds elapsed since 01.01.1970 into a string of "yyyy.mm.dd hh:mi" format
IntegerToString	Converting int into a string of preset length
ShortToString	Converting symbol code (unicode) into one-symbol string
ShortArrayToString	Copying array part into a string
StringToShortArray	Symbol-wise copying a string to a selected part of array of ushort type
CharArrayToString	Converting symbol code (ansi) into one-symbol array
StringToCharArray	Symbol-wise copying a string converted from Unicode to ANSI, to a selected place of array of uchar type
ColorToARGB	Converting color type to uint type to receive ARGB representation of the color.
ColorToString	Converting color value into string as "R,G,B"
StringToColor	Converting "R,G,B" string or string with color name into color type value
StringFormat	Converting number into string according to preset format
CharToStr	Conversion of the symbol code into a one-character string
DoubleToStr	Returns text string with the specified numerical value converted into a specified precision format
StrToDouble	Converts string representation of number to double type
StrToInteger	Converts string containing the value character representation into a value of the integer type
StrToTime	Converts string in the format "yyyy.mm.dd hh:mi" to datetime type
TimeToStr	Converts value of datetime type into a string of "yyyy.mm.dd hh:mi" format

What's new in MQL5

Added the CharArrayToStruct and StructToCharArray functions for converting the uchar array to the binary sequence and vice versa. This simplifies the exchange of byte data when working with a DLL.