To FootSee "About This JavaScript Site" in JavaScript Index and Introduction.
or
N.B. for each, "1.5555" gives "1.56", "0.5555" gives ".56"; BUT "0.0555" gives ".6", "0.0055" gives ".1", "0.0033" gives ".0", which are not all correct.
To N decimal places (|X|<1021-N) :-
N.B. as above.
To N decimal places, or e-format :-
N.B. as above.
Unsigned, to 2 decimal places, 0≤X<1019, correctly :-
Unsigned, to N decimal places, 0≤X<1021-N, correctly :-
Unsigned, to at least M digits point N decimal places, 0≤X<1021-N, correctly :-
Unsigned, to N decimal places, or e-format :-
Signed, to 2 or N decimal places, 0≤|X|<1021-N, correctly :-
N.B. Others in pink? above can be corrected similarly, by while.
N.B. goes to e-format for some small values ...
Another signed method, for two decimal places :-
Another for unsigned non-vast currency :-
Another (after Evertjan, modified) for unsigned non-vast currency :-
And, for signed non-vast currency (0.00 may be signed) :-
0r (0.00 never signed) :-
Another (seemingly OK, after Ivo) :-
Another (seemingly OK; much as posted by DA in m.p.s.j 20030306).
A direct implementation by DA of toFixed is in Rounding 1.
Another (seemingly OK) :-
Another (seemingly OK), after Targa :-
From FAQ de.comp.lang.javascript Aug 2004 :-
From FAQ de.comp.lang.javascript Aug 2004 :-
After RobG.
Modified from SAM.
Another, by me.
Note how some of those routines give improper formats for large numbers.
Should any more of those be made Methods of String or Number?
To allow for any browsers that cannot handle previously-used Number("1e"+N), one can use (X*'100000000000000000000'.substring(0,N+1)) where the literal number has N or more zeroes for the largest N. Or, for the common case of N=2, just write 100. Or use Math.pow(10, N).