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How to code mathematical function "ln" in VB?

Posted on 2003-12-03
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Last Modified: 2010-05-18
Hi experts,
I want to write a formula in VB and my formula contain mathematical function "ln" .. i just don't know how to code it in VB..
i know for "log".. just put something like log(2).. but cannot with "ln"..

thanks
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Question by:michelle_branch
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6 Comments
 
LVL 2

Expert Comment

by:diarmaid
ID: 9865369
In is a reserved word in VB + SQL
Can you give an example of what context you wish to use it?
0
 
LVL 7

Accepted Solution

by:
_agj_ earned 120 total points
ID: 9865752
ln is natural log.

log() fn in vb is natural log itself.

so u can use it.

if u want log to the base 10, do a log(x)/log(10)
0
 
LVL 1

Expert Comment

by:JonGartzia
ID: 9866048
log is ln in VB.

log(e)=1
0
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Expert Comment

by:enari
ID: 9869068
The closest thing to IN would be a case statement

select case (val)
    case  1 to 15: do something
    case 20,30,40,50: do something else
    case else:  not "IN" above"
end select

I know it's not exactly math, but it works as a replacemet.
ie "IF x in {1,5,34,34,36 } can translate to

if x = 1  or x=5 or x=34 or x=36 then
   do something
end if

(or)

select case x
case 1,5,34,34,36 : do something

hope that helps!
0
 

Expert Comment

by:enari
ID: 9869142
The closest thing to IN would be a case statement

select case (val)
    case  1 to 15: do something
    case 20,30,40,50: do something else
    case else:  not "IN" above"
end select

I know it's not exactly math, but it works as a replacemet.
ie "IF x in {1,5,34,34,36 } can translate to

if x = 1  or x=5 or x=34 or x=36 then
   do something
end if

(or)

select case x
case 1,5,34,34,36 : do something
end select

hope that helps!
0
 
LVL 7

Expert Comment

by:_agj_
ID: 9873016
no spec. grudges, but why did u opt for grade B.?
as in, i thot the answer was total.
0

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