Dear Neha,

To take admission in IGDTUW you need to appear in the JEE entrance examination and then you need to sit in the Joint Admission Counselling (JAC) of Delhi then only you will be eligible to take admission in IGDTUW. And you also need to score more than 95% for the safe side to get at least any of the branch in this college. And you need to come under  the rank of 30K to get CSE here.

Good Luck :)