The official currency of Singapore is the Singapore Dollar. It is usually abbreviated using a dollar sign $, or S$ to distinguish it from other dollar-denominated currencies.
Like many other currencies in the world, Singapore has the face of its first leader on the notes. People usually make the mistake of getting INR exchanged to USD and then USD to SGR going through a lot of two exchange rates. What the travellers should prefer instead is directly getting INR exchanged to SGD once they reach Singapore. Also, Changi money changers operate 24/7 which simplifies the process. With a fully-developed banking system, exchanging money in Singapore is as easy as pie.