The Preamble of the Indian Constitution is an introductory statement that sets out the guiding purpose, principles, and philosophy of the Constitution. It declares India to be a Sovereign, Socialist, Secular, Democratic Republic and secures to all its citizens Justice, Liberty, Equality, and Fraternity.

The Preamble has been amended only once in the history of the Indian Constitution. This amendment was made by the 42nd Constitutional Amendment Act of 1976.

Step-by-Step Explanation:

Step 1: The original Preamble, adopted on 26th November 1949, described India as a "Sovereign Democratic Republic".

Step 2: During the period of internal emergency (1975-1977), the 42nd Amendment Act was passed. This is one of the most comprehensive amendments to the Constitution.

Step 3: Through this amendment, the words "Socialist" and "Secular" were added to the Preamble. Furthermore, the phrase "unity of the Nation" was changed to "unity and integrity of the Nation".

Final Answer: Therefore, the Preamble has been amended once.

Related Topic: The 42nd Amendment Act (1976)

Often called the "Mini-Constitution," this act made sweeping changes to the Indian Constitution. Beyond amending the Preamble, it also attempted to reduce the power of the Judiciary and strengthen the authority of the Parliament, among many other significant alterations.

Formulae & Key Facts

Original Preamble Text (Pre-1976):
"We, THE PEOPLE OF INDIA, having solemnly resolved to constitute India into a SOVEREIGN DEMOCRATIC REPUBLIC..."

Amended Preamble Text (Post-1976):
"We, THE PEOPLE OF INDIA, having solemnly resolved to constitute India into a SOVEREIGN SOCIALIST SECULAR DEMOCRATIC REPUBLIC and to secure to all its citizens: JUSTICE, social, economic and political; LIBERTY of thought, expression, belief, faith and worship; EQUALITY of status and of opportunity; and to promote among them all FRATERNITY assuring the dignity of the individual and the unity and integrity of the Nation..."