⇐
Double Left Arrow
Double Left Arrow • U+21D0
Click to Copy Symbol
Symbol Description
A double-lined left arrow used for reverse implication or strong backward indication.
Primary Uses:
- •Reverse logical implication
- •Strong backward reference
- •Formal logic notation
- •Emphasis on precedence
Technical Information
Unicode
U+21D0
HTML Entity
⇐
HTML Code
⇐
CSS Code
\21D0
Hex Code
⇐
Usage Examples
Q ⇐ P (reverse implication)
Result ⇐ Cause
Effect ⇐ Origin
Input Method Guide
Windows Input Methods
1Alt Code
- 1
Make sure Num Lock is enabled
- 2
Hold down the left Alt key
- 3
Type 8656 on the numeric keypad
💡 Use Alt+8656. If Alt code fails, type 21D0 then press Alt+X in Word, or use Copy & Paste.
- 4
Release Alt key, double left arrow (⇐) will appear
2Unicode (Alt+X)
- 1
Type 21D0 in the document
- 2
Press Alt + X to convert to the symbol
💡 Alt+X works in Microsoft Word and many Office apps. It is not supported in Notepad and some third-party editors.
3Word Method
- 1
Type 21D0 then press Alt+X in Microsoft Word
- 2
Alternatively, use Insert > Symbol if Alt+X is unavailable