0

The number 0 is a fundamental concept in mathematics and represents the absence of quantity or value. It serves several important purposes: 1. **Numerical Value**: Zero is considered an integer and an even number. It represents "nothing" in a quantitative sense. 2. **Place Holder**: In the decimal system, zero is used as a placeholder to denote the magnitude of numbers (e.g., in the number 105, the zero indicates there are no tens).