Explain Decimal Number system with an example.

In Decimal Number system, a number is represented by using 10 digits — 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. Its base is 10. Numbers written without base are by default decimal numbers. For example, 2457 would mean (2457)₁₀, where 10 represents the base of decimal number.