what is the difference between exponential and scientific notation
Scientific notation Normalized scientific form is the typical form of expression of large numbers in many fields, unless an unnormalized form, such as engineering notation, is desired. Normalized scientific notation is often called exponential notation—although the latter term is more general and also applies when m is not restricted to the range 1 to 10 (as in engineering notation for instance) and to bases other than 10 (for example, 3.15×2^20).
Indian numbering system The Indian numbering system is used in the Indian subcontinent (Bangladesh, India, Nepal, Maldives, Pakistan and Sri Lanka) and in Burma. The terms lakh or lac (100,000 or 1,00,000 in the Indian system) and crore (10,000,000 or 1,00,00,000 in the Indian system)[1] are used in Indian English to express large numbers. For example, in India 150,000 rupees becomes 1.5 lakh rupees, written as ₹1,50,000 or INR 1,50,000, while 30,000,000 (thirty million) rupees becomes 3 crore rupees, written as ₹3,00,00,000 with commas at the thousand, lakh, and crore levels, and 1,000,000,000 (one billion) rupees (one hundred crore rupees or one arab अरब ) is written ₹1,00,00,00,000. While there are specific terms for numbers larger than 1 crore, these are not commonly used, and most practitioners are not familiar with these. In common parlance, the thousand, lakh, crore terminology repeats for larger numbers. Thus 1,000,000,000,000 (one trillion) becomes 1 lakh crore, and is written as 10,00,00,00,00,000.