Common names for the number 0 in English include zero, nought, naught (/ nɔːt /), and nil. In contexts where at least one adjacent digit distinguishes it from the letter O, the number is sometimes pronounced as oh or o (/ oʊ /). Informal or slang terms for 0 include zilch and zip.

Understanding the Context

As a number, zero means nothing —an absence of other values. It plays a central role in mathematics as the identity element of the integers, real numbers, and many other algebraic structures. As a digit, zero is used as a placeholder in place value systems. Historically, it was the last digit to come into use.

Key Insights

Zero is a number denoting the absence of quantity. Represented by the symbol ‘0,’ it plays a foundational role in arithmetic, algebra, computing, and scientific measurement. Zero shows that there is no amount. Example: 6 6 = 0 (the difference between six and six is zero). It is also used as a placeholder so we can...

Final Thoughts

Learn about the number zero. Get the definition and interesting zero facts and learn about its history and role in math. Zero is the integer denoted 0 that, when used as a counting number, means that no objects are present. It is the only integer (and, in fact, the only real number) that is neither negative nor positive. Zero represents the absence of quantity and serves as the dividing point between positive and negative numbers. Learn its unique mathematical properties, including its behavior in addition, subtraction, multiplication, and division, along with practical examples.

Zero, often seen as a simple circle, holds an extraordinary place in the annals of mathematics and human history. The question of who invented zero leads us into a fascinating exploration across ancient civilizations, each contributing uniquely to its development. From the early absence of zero in Roman numerals to its conceptual birth in India and independent emergence in the Mayan ...