040

040 can denote several things depending on context: a numeric value in octal notation, a telephone area code, or an identifier in data systems.

Numerically, 040 is interpreted as an octal literal in languages such as C and Perl. In octal, 040 equals 32 in decimal. The decimal value 32 corresponds to the ASCII space character, illustrating how octal literals map to common characters in ASCII.

Telecommunications: In India, 040 is the STD code for Hyderabad, Telangana. Domestic dialing uses 040 before the local number; international callers use the country code +91 and the area code 40 (often written as +91 40).

Other uses: In software and data formats, 040 may appear as a model or catalog number or as a literal string that includes leading zeros. Because of its octal interpretation, 040 is frequently used in programming tutorials to illustrate octal literals and base conversion.