Print - MQL4 - SMOLDOC

Print Function

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Signature

void Print(argument, ...);

Parameters

argument: Any values separated by commas. Maximum of 64 parameters.

Notes

Arrays cannot be passed directly; pass elements individually.

double data type is displayed with up to 16 decimal digits, in traditional or scientific format for compactness.

float data type is displayed with 5 digits after the decimal point.

For custom accuracy or format of real numbers, use PrintFormat().

bool data type is output as "true" or "false".

Dates are displayed as YYYY.MM.DD HH:MI:SS. Use TimeToString() for custom formats.

color data type is output as R,G,B or a color name if available in the color set.

The Print() function is non-operational during optimization in the Strategy Tester.

Related Functions

Alert()

Comment()

DoubleToString()

StringFormat()

PrintFormat()

TimeToString()

Example

void OnStart()
{
    // Output DBL_MAX using Print()
    Print("---- how DBL_MAX looks like ----");
    Print("Print(DBL_MAX)=",DBL_MAX);
    // Output float precision comparison
    float c = (float)M_PI;
    Print("c=",c, " Pi=",M_PI, " (float)M_PI=",(float)M_PI);
    // Real number arithmetic precision example
    double a=7, b=200;
    Print("---- Before arithmetic operations");
    Print("a=",a," b=",b);
    Print("Print(DoubleToString(b,16))=",DoubleToString(b,16));
    a=a/b;
    b=7.0/a;
    Print("----- After arithmetic operations");
    Print("Print(b)=",b);
    Print("Print(DoubleToString(b,16))=",DoubleToString(b,16));    // Small value subtraction example
    double epsilon = 1e-13;
    Print("---- Create a very small value");
    Print("epsilon=",epsilon);
    b = b - epsilon;
    Print("---- After subtracting epsilon from the b variable");
    Print("Print(b)=",b);
    Print("Print(DoubleToString(b,16))=",DoubleToString(b,16));
}

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