What are the ascii values of up down left right?

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What are the ASCII values of the arrow keys? (up/down/left/right)


There is no real ascii codes for these keys as such, you will need to check out the scan codes for these keys, known as Make and Break key codes as per helppc's information. The reason the codes sounds 'ascii' is because the key codes are handled by the old BIOS interrupt 0x16 and keyboard interrupt 0x9.

                 Normal Mode            Num lock on
                 Make    Break        Make          Break
Down arrow       E0 50   E0 D0     E0 2A E0 50   E0 D0 E0 AA
Left arrow       E0 4B   E0 CB     E0 2A E0 4B   E0 CB E0 AA
Right arrow      E0 4D   E0 CD     E0 2A E0 4D   E0 CD E0 AA
Up arrow         E0 48   E0 C8     E0 2A E0 48   E0 C8 E0 AA

Hence by looking at the codes following E0 for the Make key code, such as 0x50, 0x4B, 0x4D, 0x48 respectively, that is where the confusion arise from looking at key-codes and treating them as 'ascii'... the answer is don't as the platform varies, the OS varies, under Windows it would have virtual key code corresponding to those keys, not necessarily the same as the BIOS codes, VK_UP, VK_DOWN, VK_LEFT, VK_RIGHT.. this will be found in your C++'s header file windows.h, as I recall in the SDK's include folder.

Do not rely on the key-codes to have the same 'identical ascii' codes shown here as the Operating system will reprogram the entire BIOS code in whatever the OS sees fit, naturally that would be expected because since the BIOS code is 16bit, and the OS (nowadays are 32bit protected mode), of course those codes from the BIOS will no longer be valid.

Hence the original keyboard interrupt 0x9 and BIOS interrupt 0x16 would be wiped from the memory after the BIOS loads it and when the protected mode OS starts loading, it would overwrite that area of memory and replace it with their own 32 bit protected mode handlers to deal with those keyboard scan codes.

Here is a code sample from the old days of DOS programming, using Borland C v3:

#include <bios.h>
int getKey(void){
    int key, lo, hi;
    key = bioskey(0);
    lo = key & 0x00FF;
    hi = (key & 0xFF00) >> 8;
    return (lo == 0) ? hi + 256 : lo;
}

This routine actually, returned the codes for up, down is 328 and 336 respectively, (I do not have the code for left and right actually, this is in my old cook book!) The actual scancode is found in the lo variable. Keys other than the A-Z,0-9, had a scan code of 0 via the bioskey routine.... the reason 256 is added, because variable lo has code of 0 and the hi variable would have the scan code and adds 256 on to it in order not to confuse with the 'ascii' codes...

What are the ascii values of up down left right?, There aren't any. There isn't an ASCII code for the shift or control keys on the typical keyboard, either. One must distinguish between Character Set Encodings � There aren’t any. There isn’t an ASCII code for the shift or control keys on the typical keyboard, either. One must distinguish between Character Set Encodings and keyboard scan codes in that not all key presses or key press combinations have a pa


In short:

left arrow: 37 up arrow: 38right arrow: 39down arrow: 40

What are the ASCII values for the arrow keys- up, down, left & right , Arrow symbols alt codes and unicode html arrows, including down arrow, up arrow, right arrow, left arrow symbol codes, learn how to make an arrow icon. Lists of arrow symbols, arrow signs, arrow emojis down arrow, up arrow, right and left arrows and all kind of arrows with their Alt Code and Unicode values. Arrow Symbol Alt Codes There are different types of arrows that are represented by an Alt Code value.


Really the answer to this question depends on what operating system and programming language you are using. There is no "ASCII code" per se. The operating system detects you hit an arrow key and triggers an event that programs can capture. For example, on modern Windows machines, you would get a WM_KEYUP or WM_KEYDOWN event. It passes a 16-bit value usually to determine which key was pushed.

Arrow Symbols: Left, Right, Up and Down Arrow, 37(left arrow) � 38(up arrow) � 39(right arrow) � 40(down arrow). ive been searching the net for the ASCII of the arrow keys but no luck. i need to use it for my program which is a snake game on assembly 8086. we were tasked to make a snake game using WSAD and the arrows keys. the only thing im missing is the arrow keys. is there anything I can use??? thank you


The ascii values of the:

  1. Up key - 224 72

  2. Down key - 224 80

  3. Left key - 224 75

  4. Right key - 224 77

Each of these has two integer values for ascii value, because they are special keys, as opposed to the code for $, which is simply 36. These 2 byte special keys usually have the first digit as either 224, or 0. this can be found with the F# in windows, or the delete key.

EDIT : This may actually be unicode looking back, but they do work.

What are the ASCII values of arrow keys?, SO: What are the ascii values of up down left right?[^] An interesting discussion where you will be able to find something useful about direction� What are the ASCII values of arrow keys? Home; Articles. Client-Side Java ; (left arrow) 38(up arrow) 39(right arrow) 40(down arrow) Post a comment; Email Article;


If you're programming in OpenGL, use GLUT. The following page should help: http://www.lighthouse3d.com/opengl/glut/index.php?5

GLUT_KEY_LEFT   Left function key
GLUT_KEY_RIGHT  Right function key
GLUT_KEY_UP     Up function key
GLUT_KEY_DOWN   Down function key

 

void processSpecialKeys(int key, int x, int y) {

switch(key) {
    case GLUT_KEY_F1 : 
            red = 1.0; 
            green = 0.0; 
            blue = 0.0; break;
    case GLUT_KEY_F2 : 
            red = 0.0; 
            green = 1.0; 
            blue = 0.0; break;
    case GLUT_KEY_F3 : 
            red = 0.0; 
            green = 0.0; 
            blue = 1.0; break;
}
}

I need the ASCII values of the arrow keys., Easily find HTML arrow symbols, entities, characters and codes with ASCII, HEX, CSS and Unicode values; including right arrow, left arrow, up and down arrows.


ASCII, stands for American Standard Code for Information Interchange.It's a 7-bit character code where every single bit represents a unique character. On this webpage you will find 8 bits, 256 characters, ASCII table according to Windows-1252 (code page 1252) which is a superset of ISO 8859-1 in terms of printable characters.


Press and hold down the Alt key with your left hand, 3. Type the Alt Code value of the arrow you want. Example: If you need an arrow down symbol ↓ , type 25 on the numeric pad, holding the Alt key.


hexadecimal value: decimal value: key_left_ctrl 0x80 128 key_left_shift 0x81 129 key_left_alt 0x82 130 key_left_gui 0x83 131 key_right_ctrl 0x84 132 key_right_shift 0x85 133 key_right_alt 0x86 134 key_right_gui 0x87 135 key_up_arrow 0xda 218 key_down_arrow 0xd9 217 key_left_arrow 0xd8 216 key_right_arrow 0xd7 215 key_backspace