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

Print, String

0.9.6w