A fundamental data type that holds single-precision floating-point numbers in IEEE format. A Single variable is stored as a 32-bit (4-byte) number, ranging in value from –3.402823E38 to –1.401298E–45 for negative values, from 1.401298E–45 to 3.402823E38 for positive values, and 0. The type-declaration character is ! (ANSI character 33).