decimal ( expression )
decimal expression
Defines the maximum number of decimal places (0-15) to convert when a floating point number is changed into a string. This does not change the internal precision of numeric calculations but only changes how they are displayed or stored as a string. By default a maximum of 6 decimal digits will display.
print 2/3 decimal 10 print 2/3 decimal 15 print 2/3
will print
0.666667 0.6666666667 0.666666666666667
0.9.6w