U+21D4 LEFT RIGHT DOUBLE ARROW

Double-lined arrow pointing both left and right, the if and only if or equivalence symbol in logic.

Codepoint: U+21D4
Name: LEFT RIGHT DOUBLE ARROW
Block: Arrows
Script: Common
Category: Math Symbol (Sm)
Unicode version: 1.1
Plane: BMP
HTML: ⇔ ⇔
CSS: \21D4
UTF-8: E2 87 94
UTF-16: 21D4
UTF-32: 000021D4

Related characters

U+21D3DOWNWARDS DOUBLE ARROW
U+21D5UP DOWN DOUBLE ARROW
U+21D2RIGHTWARDS DOUBLE ARROW
U+21D6NORTH WEST DOUBLE ARROW
U+21D1UPWARDS DOUBLE ARROW
U+21D7NORTH EAST DOUBLE ARROW
U+21D0LEFTWARDS DOUBLE ARROW
U+21D8SOUTH EAST DOUBLE ARROW
U+21CFRIGHTWARDS DOUBLE ARROW WITH STROKE
U+21D9SOUTH WEST DOUBLE ARROW
U+21CELEFT RIGHT DOUBLE ARROW WITH STROKE
U+21DALEFTWARDS TRIPLE ARROW

Arrows

112 characters in the Arrows Unicode block.

U+2190LEFTWARDS ARROW
U+2191UPWARDS ARROW
U+2192RIGHTWARDS ARROW
U+2193DOWNWARDS ARROW
U+2194LEFT RIGHT ARROW
U+2195UP DOWN ARROW
U+2196NORTH WEST ARROW
U+2197NORTH EAST ARROW
U+2198SOUTH EAST ARROW
U+2199SOUTH WEST ARROW
U+219ALEFTWARDS ARROW WITH STROKE
U+219BRIGHTWARDS ARROW WITH STROKE
U+219CLEFTWARDS WAVE ARROW
U+219DRIGHTWARDS WAVE ARROW
U+219ELEFTWARDS TWO HEADED ARROW
U+219FUPWARDS TWO HEADED ARROW
U+21A0RIGHTWARDS TWO HEADED ARROW
U+21A1DOWNWARDS TWO HEADED ARROW
U+21A2LEFTWARDS ARROW WITH TAIL
U+21A3RIGHTWARDS ARROW WITH TAIL
U+21A4LEFTWARDS ARROW FROM BAR
U+21A5UPWARDS ARROW FROM BAR
U+21A6RIGHTWARDS ARROW FROM BAR
U+21A7DOWNWARDS ARROW FROM BAR
U+21A8UP DOWN ARROW WITH BASE
U+21A9LEFTWARDS ARROW WITH HOOK
U+21AARIGHTWARDS ARROW WITH HOOK
U+21ABLEFTWARDS ARROW WITH LOOP
U+21ACRIGHTWARDS ARROW WITH LOOP
U+21ADLEFT RIGHT WAVE ARROW
U+21AELEFT RIGHT ARROW WITH STROKE
U+21AFDOWNWARDS ZIGZAG ARROW
U+21B0UPWARDS ARROW WITH TIP LEFTWARDS
U+21B1UPWARDS ARROW WITH TIP RIGHTWARDS
U+21B2DOWNWARDS ARROW WITH TIP LEFTWARDS
U+21B3DOWNWARDS ARROW WITH TIP RIGHTWARDS
U+21B4RIGHTWARDS ARROW WITH CORNER DOWNWARDS
U+21B5DOWNWARDS ARROW WITH CORNER LEFTWARDS
U+21B6ANTICLOCKWISE TOP SEMICIRCLE ARROW
U+21B7CLOCKWISE TOP SEMICIRCLE ARROW
U+21B8NORTH WEST ARROW TO LONG BAR
U+21B9LEFTWARDS ARROW TO BAR OVER RIGHTWARDS ARROW TO BAR
U+21BAANTICLOCKWISE OPEN CIRCLE ARROW
U+21BBCLOCKWISE OPEN CIRCLE ARROW
U+21BCLEFTWARDS HARPOON WITH BARB UPWARDS
U+21BDLEFTWARDS HARPOON WITH BARB DOWNWARDS
U+21BEUPWARDS HARPOON WITH BARB RIGHTWARDS
U+21BFUPWARDS HARPOON WITH BARB LEFTWARDS
U+21C0RIGHTWARDS HARPOON WITH BARB UPWARDS
U+21C1RIGHTWARDS HARPOON WITH BARB DOWNWARDS
U+21C2DOWNWARDS HARPOON WITH BARB RIGHTWARDS
U+21C3DOWNWARDS HARPOON WITH BARB LEFTWARDS
U+21C4RIGHTWARDS ARROW OVER LEFTWARDS ARROW
U+21C5UPWARDS ARROW LEFTWARDS OF DOWNWARDS ARROW
U+21C6LEFTWARDS ARROW OVER RIGHTWARDS ARROW
U+21C7LEFTWARDS PAIRED ARROWS
U+21C8UPWARDS PAIRED ARROWS
U+21C9RIGHTWARDS PAIRED ARROWS
U+21CADOWNWARDS PAIRED ARROWS
U+21CBLEFTWARDS HARPOON OVER RIGHTWARDS HARPOON
U+21CCRIGHTWARDS HARPOON OVER LEFTWARDS HARPOON
U+21CDLEFTWARDS DOUBLE ARROW WITH STROKE
U+21CELEFT RIGHT DOUBLE ARROW WITH STROKE
U+21CFRIGHTWARDS DOUBLE ARROW WITH STROKE
U+21D0LEFTWARDS DOUBLE ARROW
U+21D1UPWARDS DOUBLE ARROW
U+21D2RIGHTWARDS DOUBLE ARROW
U+21D3DOWNWARDS DOUBLE ARROW
U+21D4LEFT RIGHT DOUBLE ARROW
U+21D5UP DOWN DOUBLE ARROW
U+21D6NORTH WEST DOUBLE ARROW
U+21D7NORTH EAST DOUBLE ARROW
U+21D8SOUTH EAST DOUBLE ARROW
U+21D9SOUTH WEST DOUBLE ARROW
U+21DALEFTWARDS TRIPLE ARROW
U+21DBRIGHTWARDS TRIPLE ARROW
U+21DCLEFTWARDS SQUIGGLE ARROW
U+21DDRIGHTWARDS SQUIGGLE ARROW
U+21DEUPWARDS ARROW WITH DOUBLE STROKE
U+21DFDOWNWARDS ARROW WITH DOUBLE STROKE
U+21E0LEFTWARDS DASHED ARROW
U+21E1UPWARDS DASHED ARROW
U+21E2RIGHTWARDS DASHED ARROW
U+21E3DOWNWARDS DASHED ARROW
U+21E4LEFTWARDS ARROW TO BAR
U+21E5RIGHTWARDS ARROW TO BAR
U+21E6LEFTWARDS WHITE ARROW
U+21E7UPWARDS WHITE ARROW
U+21E8RIGHTWARDS WHITE ARROW
U+21E9DOWNWARDS WHITE ARROW
U+21EAUPWARDS WHITE ARROW FROM BAR
U+21EBUPWARDS WHITE ARROW ON PEDESTAL
U+21ECUPWARDS WHITE ARROW ON PEDESTAL WITH HORIZONTAL BAR
U+21EDUPWARDS WHITE ARROW ON PEDESTAL WITH VERTICAL BAR
U+21EEUPWARDS WHITE DOUBLE ARROW
U+21EFUPWARDS WHITE DOUBLE ARROW ON PEDESTAL
U+21F0RIGHTWARDS WHITE ARROW FROM WALL
U+21F1NORTH WEST ARROW TO CORNER
U+21F2SOUTH EAST ARROW TO CORNER
U+21F3UP DOWN WHITE ARROW
U+21F4RIGHT ARROW WITH SMALL CIRCLE
U+21F5DOWNWARDS ARROW LEFTWARDS OF UPWARDS ARROW
U+21F6THREE RIGHTWARDS ARROWS
U+21F7LEFTWARDS ARROW WITH VERTICAL STROKE
U+21F8RIGHTWARDS ARROW WITH VERTICAL STROKE
U+21F9LEFT RIGHT ARROW WITH VERTICAL STROKE
U+21FALEFTWARDS ARROW WITH DOUBLE VERTICAL STROKE
U+21FBRIGHTWARDS ARROW WITH DOUBLE VERTICAL STROKE
U+21FCLEFT RIGHT ARROW WITH DOUBLE VERTICAL STROKE
U+21FDLEFTWARDS OPEN-HEADED ARROW
U+21FERIGHTWARDS OPEN-HEADED ARROW
U+21FFLEFT RIGHT OPEN-HEADED ARROW