Thread: quick question about log

  1. #1
    Registered User
    Join Date
    Oct 2008

    quick question about log

    i'm working on an assignment and i'm suppose to take the log of a number , on the assignment sheet it looks like this:

    log( totalAmount) - 1

    my question is how do i write log in c++ ? like i know to get a number to the second power x it will be something like (pow(number), x)

    so anyone who can help is welcome

  2. #2
    Malum in se abachler's Avatar
    Join Date
    Apr 2007
    log in c is written
    #include <math.h>
    a = log(b);
    which gives the natural log of b. If you need to convert it to soem other base then simply divide the natural log of b by the natural log of the base you want and it gives you the log of b in that base.

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