source: trunk/essentials/sys-apps/gawk/test/math.awk

BEGIN {
        pi = 3.1415927
        printf "cos(%f) = %f\n", pi/4, cos(pi/4)
        printf "sin(%f) = %f\n", pi/4, sin(pi/4)
        e = exp(1)
        printf "e = %f\n", e
        printf "log(e) = %f\n", log(e)
        printf "sqrt(pi ^ 2) = %f\n", sqrt(pi ^ 2)
        printf "atan2(1, 1) = %f\n", atan2(1, 1)
}