Hello Experts. I am trying to get an program to reach a number with minimum number of iteration. what I wrote is given below. Is there a better way? <\p> 

eg: I want to reach 1000 starting from 30. 

script output
-------------

start with 30
Find 1000


ASCENT
130
230
330
430
530
630
730
830
930
1030


DESCENT
1442
1186
1058
994
1026
1010
1002
998
1000


GOT IT...$newScale == $dest --> 1000 == 1000
Total Iteration taken is 21

[download]
my $dest = 1000;
my $start = 30;
my $steps = 100;
my $newScale = $start;
my $ascent = 1;
my $descent = 0;
my $n = 9; # n is power of 2 to reach $steps
my $i=1;
print "start with $start\n";
print "Find $dest\n";
print "\n\nASCENT\n";
while ($ascent) {

        if ($newScale < $dest) {
                        $i++;
                        $newScale = $newScale + $steps;
                        print "$newScale\n";

        } else {
                 $ascent = 0;
                 $descent = 1;
                 $newScale = $newScale - $steps;
                 $i++;

    }
}

print "\n\nDESCENT\n";
while ($descent) {
    if ( $n < 0 ) { last; }
    if ($newScale > $dest) {
        $newScale = $newScale - 2**$n;
                print "$newScale\n";
                $i++;
    } else {
        $newScale = $newScale + 2**$n;
                $i++;
                print "$newScale\n";
    }
        if ($newScale == $dest) {
        print "\n\nGOT IT...\$newScale == \$dest --> $newScale == $des
+t \nTotal Iteration taken is $i \n";
                last;
    }
    $n--;
}

[download]

In reply to search algo to reach a number by vijesh

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