Explanation:

An ordinance can be deemed as a temporary law that have the same power as that of a Bill. The President is given the power to issue ordinances and this could be said to his most important power. The President is granted the power to issue ordinances according to the Article 123 of our Constitution.The issuing of an ordinance is subject to various limitations and conditions. 
Some of these limitations are:
a) Ordinance can be issued only when both Lok Sabha and Rajya Sabha are not in session or only one of them is in session. 
b) The President’s decision to promulgate an ordinance is subject to judicial action in case it is found to be malafide
c) The President can issue ordinances subject to the advice of Prime Minister and his council of Ministers
d) The scope of the ordinance is limited to the subjects on which the Parliament itself is allowed to make laws
e) An ordinance is not superior to the Constitution has must follow it too. For example, an ordinance cannot breach Fundamental Rights.