Introduction

• A constitution is a set of fundamental principles according to which a state is constituted or governed.
• The Constitution specifies the basic allocation of power in a State and decides who gets to decide what the laws will be.
• The Constitution first defines how a Parliament will be organized and empowers the Parliament to decide the laws and policies.
• The Constitution sets some limitations on the Government as to what extent a Government can impose rules and policies on its citizen. These limits are fundamental in the sense that the Government may never trespass them.
• The Constitution enables the Government to fulfil the aspirations of a society and create conditions for a just society. 

Distribution of Power

• The Indian Constitution horizontally distributes power across the three following institutions, as depicted in the following illustration −

The Parliament

• All the elected representatives collectively form a body called as Parliament.
• The Parliament consists of two houses namely Rajya Sabha (Upper House) and Lok Sabha (Lower House).
• The majority group (elected through the election) in the Parliament is called upon to make the government.
• The government is responsible for making policies and other national decisions, which are generally taken up after intensive debate and meaningful discussions in the parliament.
• The Prime Minister is the head of the government. The prime minister presided over the meetings of the cabinet in which the big decisions are taken.

The Executive

• The President of India is the head of the State; however, he/she exercises only nominal powers.
• The President’s functions are mainly ceremonial in nature (similar to the Queen of Britain).
• The following diagram illustrates the hierarchy of the Indian Government 

The Judiciary