All the people who accept Islam have to acknowledge the Five Pillars of Islam.
They are:
1. There is no God except Allah and Mohammed is his Prophet (Shahada).
2. Pray five times a day (Namaz/Salat)
3. Zakat (Almsgiving)
4. Fasting during the month of Ramzan
(5) Hajj (Pilgrimage to Mecca)