Re : spark-shell not executed in cygwin but executed in cmd prompt

I tried launching spark-shell but giving no results

Soumalya@DESKTOP-BBO5N18 /cygdrive/d/spark-1.6.3-bin-hadoop2.6/bin
$ spark-shell

Soumalya@DESKTOP-BBO5N18 /cygdrive/d/spark-1.6.3-bin-hadoop2.6/bin

Could you please guide me on this.