StrToFloat

function StrToFloat(FloatString string):Extended;

The StrToFloat function converts a number string, FloatString such as '123,456' into an Extended floating point number. It supports integer, floating point, and scientific (exponent) formats.

If a decimal point appears in FloatString, then it must match the current DecimalSeparator value.

Example:

Base Syntax

 var
   stringValue : string;
   floatValue  : float;
 
 begin
 
   // Set up the source string containing a number representation
   stringValue := '123,456';
 
   // Convert it to a floating point number
   floatValue  := StrToFloat(stringValue);
 
   // And display the value
   ShowMessage(stringValue+' = '+FloatToStr(floatValue));
 
 end;

TRObject Syntax

 var
   stringValue : string;
   floatValue  : float;
 
 {
   // Set up the source string containing a number representation
   stringValue = '123,456';
   // Convert it to a floating point number
   floatValue  = StrToFloat(stringValue);
   // And display the value
   ShowMessage(stringValue+' = '+FloatToStr(floatValue));
 }

Output:

123,456 = 123,456