Highlight the functions of the president in the 1979 constitution of Nigeria

• He is the head
  of state: The president is the head of state. Thus he
  performs ceremonial functions e.g he
  receives the credentials of representatives
  of foreign ambassadors or high commissioners. 
• He is the head  of
  government: He rules the country together with his
  ministers. He is responsible for the success or
  failure of the government.
• He assents to
  bills: He signs bills passed by the legislature
  before such bills can become laws. 
• Appointment of ministers: He appoints his ministers and assigns to them
  the ministries they are to run. He also
  appoints the chief justice and ambassadors. 
• As the commander in chief of the armed forces,
  he can determine the operational use of
  the armed forces. 
• He exercises prerogative of mercy: The president can grant pardon to any person who is serving a jail sentence, i.e. he can order the release of
  any person  from jail.
•  Declaration of a state of emergency: The president can declare a state of
  emergency in the whole country or any party of it in certain situations.
•  Coordination
  of activities of government departments: He coordinates the activities of all
  government departments and ensures that all government
  policies are implemented. 
• Introduction of bills: He can propose a bill to the legislature to
  be passed into law.
• Presentation of the annual
  budget: The budget which is a statement of. the government’s annual expected income and expenditure is presented by
  the president.
• Signing
  of treaties: The president signs agreements of co
  -operation in different areas of life, e.g. on science
  and technology, agriculture, culture etc.