 
 
 
25.5.6  Converting real numbers to strings
The format
command converts a real number to a string.
- 
format takes two arguments:
- 
r, a real number.
- str, a string used for formatting.
 
- format(str) returns r
as a string with the requested formatting.
The formatting string can be one of the following:
- 
f (for floating-point format) followed by the number
of digits to put after the decimal point.
- s (for scientific format) followed by the
number of significant digits.
- e (for engineering format) followed by the
number of digits to put after the decimal point, with one digit
before the decimal points.
Examples
| format(sqrt(2)*10^10,"f13") | 
|  | | “14142135623.7308959960938” |  |  |  |  |  |  |  |  |  |  | 
 | 
| format(sqrt(2)*10^10,"s13") | 
| format(sqrt(2)*10^10,"e13") | 
 
 
