Every country has diverse groups of people. People have differences. Hence, the need to have a set of rules. To maintain a trust it as best to write down these rules. Thus the constitution of a country is a set of written rules that are accepted by all.
A constitution:-
1. generates trust and coordination.
2. Specifies how government will be constituted.
3. Lays down limits on the powers of the government.
4. Expresses the aspirations of the people.