Rounding to x places?

DayCuts · Post by **DayCuts** » Sat Aug 21, 2004 12:53 pm

I have looked through the tcl/tk help and tried using expr round(), this works of corse. However i seem unabled to round accurately to a specific X places. I have seen in a few places people use things such as [expr round(9.345) * 1.0] or similar things, but such workarounds are not very accurate as you can see simply by looking at the logic in the math.

Can anybody help me out with a more accurate method of rounding? TIA

Post by **user** » Sun Aug 22, 2004 2:27 pm

format %.<number of decimals>f <value>
eg:

Code: Select all

format %.2f 4.567

returns 4.57

DayCuts · Post by **DayCuts** » Sun Aug 22, 2004 3:13 pm

Ah, thank you user. I guess i just didn't relate format to string/math manipulation.

awyeah · Post by **awyeah** » Mon Aug 23, 2004 12:03 am

Actually its the same as in C, if you take a closer look.

%2f = 2 decimal places
%3f = 3 decimal places... and so on.

Post by **user** » Mon Aug 23, 2004 6:05 am

awyeah wrote:%2f = 2 decimal places

Nope.