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Hema ,

IT field definitely fetches you good returns provided you get the "first" break from a god father , later as you gain experience, you can earn quite nicely, to caution you , it is not so...

i think you are checking the condition after incrementing index , a for loop is essentially :
for (expr1; expr2; expr3)
statement
is equivalent to
expr1;
while (expr2) {
statement
expr3;
}