Sikhs believe there is one God who is the same for all people of all religions. Sikhism is based on the teachings of Guru Nanak Dev (1469-1539) and the nine gurus that came after him and its followers are called Sikhs.
There are about 23 million Sikhs worldwide with the majority living in India. They worship in a Gurdwara.
Many young men participate in the Amrit ceremony where among other commitments they do not cut bodily hair. Long hair has historically been regarded as a symbol of strength and holiness and for Sikhs it is a reminder to behave like the guru (who had long hair) and also establishes a commitment to group consciousness and an acceptance of God's will.
Long hair is worn underneath a turban - which also marks Sikhs out visably from other religions. Sikhs can also wear a patka or bandana as well as a turban, the wearing of a turban does not and should not prevent a Sikh from playing football but for affiliated games the turban is replaced by a patka.