A national anthem (also national hymn, song etc.) is a generally patriotic musical composition that evokes and eulogizes the history, traditions and struggles of its people, recognized either by a nation's government as the official national song, or by convention through use by the people. The majority of national anthems are either marches or hymns in style. The countries of Latin America tend towards more operatic pieces, while a handful of countries use a simple fanfare.
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Every nations song for it's identity...genrally uplifts the spirit and mood of the country's citizens The one which is played in all national and official functions. for us !jan gan man adhinayak jai yeh bharat bhagya vidhata