OpenSCAD User Manual/String Functions

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Convert all arguments to strings and concatenate.

Usage examples:

echo ("This is ",number,3," and that's it.");
echo (str("This is ",number,3," and that's it."));


ECHO: "This is ", 2, 3, " and that's it."
ECHO: "This is 23 and that's it."


[Note: Requires version 2015.03]

Convert numbers to a string containing character with the corresponding code. OpenSCAD uses Unicode, so the number is interpreted as Unicode code point. Numbers outside the valid code point range will produce an empty string.


Convert one code point to a string of length 1 (number of bytes depending on UTF-8 encoding) if the code point is valid.
Convert all code points given in the argument vector to a string.
Convert all code points produced by the range argument to a string.


echo(chr(65), chr(97));      // ECHO: "A", "a"
echo(chr(65, 97));           // ECHO: "Aa"
echo(chr([66, 98]));         // ECHO: "Bb"
echo(chr([97 : 2 : 102]));   // ECHO: "ace"
echo(chr(-3));               // ECHO: ""
echo(chr(9786), chr(9788));  // ECHO: "☺", "☼"
echo(len(chr(9788)));        // ECHO: 1

Note: When used with echo() the output to the console for character codes greater than 127 is platform dependent.

Also See search()[edit]

search() for text searching.