In logic, a set of symbols is commonly used to express logical representation. × horseshoe of implication Ctrl-Alt-I ( negation Alt-N â is a tautology (double turnstile) Alt-T ( therefore, Alt-3 ( universal quantifier Alt-A ( existential quantifier Alt-E What follows is a complete list of Alt codes and symbols. Once you release the key, the corresponding character will appear. DESIRED SYMBOLS. Codes can be used within HTML, Java..etc programming languages. Alt 169 ® Bracketing Alt 229 Ï Alt 0180 ´ Alt 93 ] Alt 0202 Ê Alt 0234 ê Alt 0153 â¢ Alt Code Symbol Alt 231 Ï Alt 0184 ¸ Alt 123 { Alt 0203 Ë Alt 0235 ë Filled Arrows Alt 40 ( Alt 232 Î¦ Web Marketing Alt 125 } Alt 0204 Ì Alt 0236 ì Alt 16 Alt 41 ) Alt 237 Ï by Editing Alt 0205 Í Alt 0237 í Alt-Codes can be typed on Microsoft Operating Systems: First make sure that numlock is on, Then press and hold the ALT key, While keeping ALT key pressed type the code for the symbol that you want and release the ALT key. Some codes like that for xÌ (X-bar) are actually a combination of two codes â the base letter x plus a code for the line above (&â#772: or Ì). Logic math symbols table. Unicode codes can not be typed. Alt Code Shortcuts Images â Currency, Math, Special, Zodiac and All Symbols If you are looking for alt key shortcuts in image format, click the below links to get download the shortcuts images. Alt Codes » . Logic signs and symbols. The following table lists many common symbols, together with their name, pronunciation, and the related field of mathematics. ALT Codes for Mathematical Symbols Alt Code Symbol Description Alt 48 - 57 0 - 9 zero to nine Alt Codes for Basic Operators ; Alt Code Symbol Description Alt 43 + Plus Sign Alt 45 - Minus Sign Alt 0215 × Multiplication Sign Alt 0247 ÷ Obelus / Division ign Triangle Symbols Square Symbols Rectangle Symbols The chart also shows math symbols such as greater than or equal to and not equal to , plus percent, square root, per million, infinity, therefore, and more. Note: These symbols use combining characters and may not appear correctly in some older browsers. Remember to press and hold the Alt key and enter a 0 (zero) before each code; for example: if the chart shows 169 as the copyright symbol, you must enter 0169 (that is, from 0 â¦ What are ALT Codes? On the IBM Personal Computer, a computer user could enter a special character or symbol from IBMâs Code Page 437 / DOS by holding down the ALT key and entering the decimal code (0, 1-255) on the numeric key pad that corresponds to the special character or symbol, giving rise to the term âALT codesâ. We have got you covered. Fabulous Code Chart for Numbers, Math & Currency (ALT, HTML, and ASCII Codes) This chart displays the ALT and ASCII (HTML) codes for numbers, including superscripts and fractions. Well, fear no more. Press and hold the alt key while you type using the numeric pad in the numerical sequence. Symbol Description Keystrokes â¡ equivalence Ctrl-Alt-Q. Math Symbols. For PC users, you need to make sure that your number lock is on. Logic Symbols. Additionally, the third column contains an informal definition, the fourth column gives a short example, the fifth and sixth give the Unicode location and name for use in HTML documents. Once the image is opened in a new tab, right click and save to your PC or Mac for offline use.