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8 year oldRecep Tayyip Erdogan said citizens should not have "the slightest concern with regards to democracy, rule of law, fundamental rights and freedoms".
The state of emergency would protect those values from attacks against them, he said, in a speech in Ankara.
The president praised those who were killed fighting against the coup as "martyrs".
The nation would "never forget the bravery and sacrifice of those who lost their lives", he said, describing "epics of heroic bravery throughout the night".
Mr Erdogan said foreign nations should stay out of Turkish affairs, adding: "This nation has the right to determine our own destiny."