0e3

0e3 is a numeric literal used in many programming languages and calculators to denote a floating-point number in scientific notation. The notation consists of a significand, followed by the letter e (or E) and an exponent indicating the power of ten. In 0e3, the significand is 0 and the exponent is 3, so the value is 0 × 10^3 = 0.

In practice, 0e3 is treated as a floating-point value equal to zero. For example, in Python, evaluating 0e3 yields 0.0 as a float. In JavaScript, 0e3 is interpreted as a number equal to 0. The same applies in C, C++, and Java: the literal 0e3 is valid and represents 0.0 in floating-point form. Note that some environments may distinguish a sign for zero, so expressions like -0e3 can yield -0.0 in languages that preserve the sign of zero.

Important details and common questions: the e denotes a base-10 exponent, not Euler's number e. The notation is generally case-insensitive, so 0e3, 0E3, and 0e+3 are equivalent in value. Because the significand is zero, any exponent applied to 0 yields zero, including negative exponents (0e-3 equals 0.0). This makes 0e3 a convenient, concise way to express zero in scientific notation, though its value is the same as writing 0 or 0.0.