Alt code
Alt code
An alt code is a numeric code that, when entered on a keyboard while holding down the Alt key, inserts a special character or symbol into a document or program. These codes allow access to characters that are not present on a standard keyboard, such as foreign language characters, mathematical symbols, and graphics.
What does Alt code mean?
An Alt code, abbreviated from Alternative Character Code, is a numeric code that represents a special character not readily available on a standard keyboard. It allows users to input uncommon symbols, accented letters, mathematical formulas, and other characters not included in the standard character set.
To type an Alt code, press and hold the Alt key on the keyboard while entering the corresponding numeric code using the numeric keypad. For instance, holding down Alt and typing 0169 will produce the © (copyright) symbol.
Applications
Alt codes are particularly useful in technical writing, Coding, and design. They enable users to insert specialized characters that enhance the readability and precision of documents.
Technical Writing: Alt codes allow authors to include technical symbols, Greek letters, and mathematical formulas, ensuring accurate representation of complex concepts.
Coding: Programmers use Alt codes to incorporate special characters into code, such as the degree symbol (°), the section symbol (§), and the left arrow (←).
Design: Graphic designers employ Alt codes to insert unique symbols, arrows, and shapes into their designs, adding visual interest and clarity.
History
The concept of Alt codes originated in the early days of computing when character sets were limited. In 1981, IBM introduced the IBM PC with an 8-Bit character set that could only Display 256 symbols. To expand this limited set, IBM implemented Alt codes, providing a way to Access additional characters.
Over time, as character sets expanded, Alt codes remained a useful feature for accessing specialized characters. Today, Alt codes are supported by various operating systems and software applications, ensuring their continued relevance in modern computing.