Though Sumerians in Mesopotamia civilization, Babylonians, and Meso-americans also used zero as a symbol. Different words symbolized zero, or nothing, such as "void," "sky" or "space." The proper mathematical uses of zero started in the 7th century by Brahmagupta. Mathematical equations were spelled out or spoken in poetry or chants rather than symbols. For the invention of zero, most credit goes for 2 Indian mathematicians and astronomer Aryabhatta and Brahmagupta.
He developed a symbol for zero: a dot underneath numbers.
In 628 AD, Brahmagupta used a dot below numbers to symbolize zero. "Zero and its operation are first defined by [Hindu astronomer and mathematician] Brahmagupta in 628," said Gobets. Who invented zero: Brahmagupta or Aryabhata?
In the early 7th century, the Indian astronomer and mathematician Brahmagupta wrote the first clear mathematical definition of zero, although he did not claim to have invented the concept himself. The concept of zero first appeared in India around 458 BC. The Indian scholar Pingala used binary numbers and was the first to use the Sanskrit word ‘sunya’ for zero. Brahmagupta’s genius, though, came in his treatment of the concept of (then relatively new) the number zero. Gupta Dynasty (319-543CE) was one of the ruling families that dominated the classical Indian era along with the Maurya Dynasty. Gupta Dynasty.
Instead, according to the Guardian, it seem likely that it had already been in use in Indian mathematics for some time before Brahmagupta wrote his treatise. Before that, mathematicians always used a blank space to show zero or nothing. Brahmagupta, (born 598—died c. 665, possibly Bhillamala [modern Bhinmal], Rajasthan, India), one of the most accomplished of the ancient Indian astronomers.He also had a profound and direct influence on Islamic and Byzantine astronomy.. Brahmagupta was an orthodox Hindu, and his religious views, particularly the Hindu yuga system of measuring the ages of mankind, influenced his work.