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SigDigStr


Unit: SDL_stringl
Class: None
Declaration: [1] function SigDigStr (data: double; Width, NSigDig: integer): string;
[2] function SigDigStr (data: double; Width, NSigDig: integer; NoBlanks: boolean): string;

The function SigDigStr converts the numerical value data into a string of length Width showing NSigDig significant digits. (Note the difference between number of decimal places and number of significant digits).

The optional parameter NoBlanks (Version [2]) suppresses any leading blanks if set to TRUE. Please note that, for example, SigDigStr(xx,8,4,true) is not the same as SigDigStr(xx,1,4,false). Following are the results for different parameters (assuming that xx = 23.12345, the resulting blanks are indicated by the tilde sign ~):

SigDigStr(xx,8,4,true)
23.12
SigDigStr(xx,8,4,false)
~~~23.12
SigDigStr(xx,1,4,true)
2.312E+01
SigDigStr(xx,1,4,false)
~2.312E+01

Hint: The number of significant digits is not restricted if data is greater than 10NSigSig.

Example: Assuming x to be 23.725821 the statement astr := SigDigStr(x,10,5); assigns the string '    23.726' to the variable 'astr'. The length of astr is 10, the value of x is rounded to 5 significant digits.



Last Update: 2013-Dec-06