C Examples Number System Conversion

A number system is a way to represent numbers using a set of symbols. The most common systems are:

System	Base	Symbols
Decimal	10	0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Binary	2	0, 1
Octal	8	0, 1, 2, 3, 4, 5, 6, 7
Hexadecimal	16	0-9, A-F

Why Convert Number Systems?

Computers operate in binary, so decimal values often need conversion.
Octal and Hexadecimal are shorter representations of binary data.
Embedded systems, networking, and programming widely use number conversion.

Real-Time Applications

Embedded Systems: Microcontrollers read data in binary, sometimes need octal or hexadecimal conversion.
Networking: Systems convert IP addresses between decimal and binary.
Computer Graphics: Designers often represent colors in hexadecimal (e.g., #FF5733).
Digital Electronics: Engineers use binary, octal, and hexadecimal in logic circuits and memory addressing.
Programming: Low-level programming and debugging often require conversions between decimal, hex, and binary.

Binary Number to Decimal and vice-versa

From Binary Number to Hexa-Decimal and vice-versa

Binary_to_Hexadecimal_using_pow_function.c

Binary Number to Octal and vice-versa

Code will add soon

Octal Number to Decimal and vice-versa

Code will add soon

Convert Decimal to Binary Number vice-versa

Decimal_to_Binary.c

Decimal to Hexa Decimal Number vice-versa

Decimal_to_Hexadecimal.c

ASCII Value

C Program to Find ASCII Value of a Character

Code:

#include <stdio.h>
int main()
{
    char c;
    printf("Enter a character: ");

    // Reads character input from the user
    scanf("%c", &c);

    // %d displays the integer value of a character
    // %c displays the actual character
    printf("ASCII value of %c = %d", c, c);
    return 0;
}

Output:

Enter a character: A
ASCII value of A = 65
--------------------------------
Process exited after 7.396 seconds with return value 0
Press any key to continue . . .

Explanation:

In this program, the user is asked to enter a character which is stored in variable c.
The ASCII value of that character is stored in variable c rather than that variable itself.
When %d the format string is used, 65 (ASCII value of ‘A’) is displayed.
When %c the format string is used, ‘A’ itself is displayed.

C Program to List out all ASCII Value

Code:

#include <stdio.h>
void main()
{
	int i;
	
	for(i=0;i<=255;i++)
		printf("ASCII value of character %c: %d.\n",i,i);	
}

Output:

ASCII value of character  : 0.
ASCII value of character ☺: 1.
ASCII value of character ☻: 2.
ASCII value of character ♥: 3.
ASCII value of character ♦: 4.
ASCII value of character ♣: 5.
ASCII value of character ♠: 6.
ASCII value of character : 7.
ASCII value of character: 8.
ASCII value of character        : 9.
ASCII value of character
: 10.
ASCII value of character ♂: 11.
ASCII value of character ♀: 12.
: 13. value of character
ASCII value of character ♫: 14.
ASCII value of character ☼: 15.
ASCII value of character ►: 16.
ASCII value of character ◄: 17.
ASCII value of character ↕: 18.
ASCII value of character ‼: 19.
ASCII value of character ¶: 20.
ASCII value of character §: 21.
ASCII value of character ▬: 22.
ASCII value of character ↨: 23.
ASCII value of character ↑: 24.
ASCII value of character ↓: 25.
ASCII value of character →: 26.
ASCII value of character ←: 27.
ASCII value of character ∟: 28.
ASCII value of character ↔: 29.
ASCII value of character ▲: 30.
ASCII value of character ▼: 31.
ASCII value of character  : 32.
ASCII value of character !: 33.
ASCII value of character ": 34.
ASCII value of character #: 35.
ASCII value of character $: 36.
ASCII value of character %: 37.
ASCII value of character &: 38.
ASCII value of character ': 39.
ASCII value of character (: 40.
ASCII value of character ): 41.
ASCII value of character *: 42.
ASCII value of character +: 43.
ASCII value of character ,: 44.
ASCII value of character -: 45.
ASCII value of character .: 46.
ASCII value of character /: 47.
ASCII value of character 0: 48.
ASCII value of character 1: 49.
ASCII value of character 2: 50.
ASCII value of character 3: 51.
ASCII value of character 4: 52.
ASCII value of character 5: 53.
ASCII value of character 6: 54.
ASCII value of character 7: 55.
ASCII value of character 8: 56.
ASCII value of character 9: 57.
ASCII value of character :: 58.
ASCII value of character ;: 59.
ASCII value of character <: 60.
ASCII value of character =: 61.
ASCII value of character >: 62.
ASCII value of character ?: 63.
ASCII value of character @: 64.
ASCII value of character A: 65.
ASCII value of character B: 66.
ASCII value of character C: 67.
ASCII value of character D: 68.
ASCII value of character E: 69.
ASCII value of character F: 70.
ASCII value of character G: 71.
ASCII value of character H: 72.
ASCII value of character I: 73.
ASCII value of character J: 74.
ASCII value of character K: 75.
ASCII value of character L: 76.
ASCII value of character M: 77.
ASCII value of character N: 78.
ASCII value of character O: 79.
ASCII value of character P: 80.
ASCII value of character Q: 81.
ASCII value of character R: 82.
ASCII value of character S: 83.
ASCII value of character T: 84.
ASCII value of character U: 85.
ASCII value of character V: 86.
ASCII value of character W: 87.
ASCII value of character X: 88.
ASCII value of character Y: 89.
ASCII value of character Z: 90.
ASCII value of character [: 91.
ASCII value of character \: 92.
ASCII value of character ]: 93.
ASCII value of character ^: 94.
ASCII value of character _: 95.
ASCII value of character `: 96.
ASCII value of character a: 97.
ASCII value of character b: 98.
ASCII value of character c: 99.
ASCII value of character d: 100.
ASCII value of character e: 101.
ASCII value of character f: 102.
ASCII value of character g: 103.
ASCII value of character h: 104.
ASCII value of character i: 105.
ASCII value of character j: 106.
ASCII value of character k: 107.
ASCII value of character l: 108.
ASCII value of character m: 109.
ASCII value of character n: 110.
ASCII value of character o: 111.
ASCII value of character p: 112.
ASCII value of character q: 113.
ASCII value of character r: 114.
ASCII value of character s: 115.
ASCII value of character t: 116.
ASCII value of character u: 117.
ASCII value of character v: 118.
ASCII value of character w: 119.
ASCII value of character x: 120.
ASCII value of character y: 121.
ASCII value of character z: 122.
ASCII value of character {: 123.
ASCII value of character |: 124.
ASCII value of character }: 125.
ASCII value of character ~: 126.
ASCII value of character ⌂: 127.
ASCII value of character Ç: 128.
ASCII value of character ü: 129.
ASCII value of character é: 130.
ASCII value of character â: 131.
ASCII value of character ä: 132.
ASCII value of character à: 133.
ASCII value of character å: 134.
ASCII value of character ç: 135.
ASCII value of character ê: 136.
ASCII value of character ë: 137.
ASCII value of character è: 138.
ASCII value of character ï: 139.
ASCII value of character î: 140.
ASCII value of character ì: 141.
ASCII value of character Ä: 142.
ASCII value of character Å: 143.
ASCII value of character É: 144.
ASCII value of character æ: 145.
ASCII value of character Æ: 146.
ASCII value of character ô: 147.
ASCII value of character ö: 148.
ASCII value of character ò: 149.
ASCII value of character û: 150.
ASCII value of character ù: 151.
ASCII value of character ÿ: 152.
ASCII value of character Ö: 153.
ASCII value of character Ü: 154.
ASCII value of character ¢: 155.
ASCII value of character £: 156.
ASCII value of character ¥: 157.
ASCII value of character ₧: 158.
ASCII value of character ƒ: 159.
ASCII value of character á: 160.
ASCII value of character í: 161.
ASCII value of character ó: 162.
ASCII value of character ú: 163.
ASCII value of character ñ: 164.
ASCII value of character Ñ: 165.
ASCII value of character ª: 166.
ASCII value of character º: 167.
ASCII value of character ¿: 168.
ASCII value of character ⌐: 169.
ASCII value of character ¬: 170.
ASCII value of character ½: 171.
ASCII value of character ¼: 172.
ASCII value of character ¡: 173.
ASCII value of character «: 174.
ASCII value of character »: 175.
ASCII value of character ░: 176.
ASCII value of character ▒: 177.
ASCII value of character ▓: 178.
ASCII value of character │: 179.
ASCII value of character ┤: 180.
ASCII value of character ╡: 181.
ASCII value of character ╢: 182.
ASCII value of character ╖: 183.
ASCII value of character ╕: 184.
ASCII value of character ╣: 185.
ASCII value of character ║: 186.
ASCII value of character ╗: 187.
ASCII value of character ╝: 188.
ASCII value of character ╜: 189.
ASCII value of character ╛: 190.
ASCII value of character ┐: 191.
ASCII value of character └: 192.
ASCII value of character ┴: 193.
ASCII value of character ┬: 194.
ASCII value of character ├: 195.
ASCII value of character ─: 196.
ASCII value of character ┼: 197.
ASCII value of character ╞: 198.
ASCII value of character ╟: 199.
ASCII value of character ╚: 200.
ASCII value of character ╔: 201.
ASCII value of character ╩: 202.
ASCII value of character ╦: 203.
ASCII value of character ╠: 204.
ASCII value of character ═: 205.
ASCII value of character ╬: 206.
ASCII value of character ╧: 207.
ASCII value of character ╨: 208.
ASCII value of character ╤: 209.
ASCII value of character ╥: 210.
ASCII value of character ╙: 211.
ASCII value of character ╘: 212.
ASCII value of character ╒: 213.
ASCII value of character ╓: 214.
ASCII value of character ╫: 215.
ASCII value of character ╪: 216.
ASCII value of character ┘: 217.
ASCII value of character ┌: 218.
ASCII value of character █: 219.
ASCII value of character ▄: 220.
ASCII value of character ▌: 221.
ASCII value of character ▐: 222.
ASCII value of character ▀: 223.
ASCII value of character α: 224.
ASCII value of character ß: 225.
ASCII value of character Γ: 226.
ASCII value of character π: 227.
ASCII value of character Σ: 228.
ASCII value of character σ: 229.
ASCII value of character µ: 230.
ASCII value of character τ: 231.
ASCII value of character Φ: 232.
ASCII value of character Θ: 233.
ASCII value of character Ω: 234.
ASCII value of character δ: 235.
ASCII value of character ∞: 236.
ASCII value of character φ: 237.
ASCII value of character ε: 238.
ASCII value of character ∩: 239.
ASCII value of character ≡: 240.
ASCII value of character ±: 241.
ASCII value of character ≥: 242.
ASCII value of character ≤: 243.
ASCII value of character ⌠: 244.
ASCII value of character ⌡: 245.
ASCII value of character ÷: 246.
ASCII value of character ≈: 247.
ASCII value of character °: 248.
ASCII value of character ∙: 249.
ASCII value of character ·: 250.
ASCII value of character √: 251.
ASCII value of character ⁿ: 252.
ASCII value of character ²: 253.
ASCII value of character ■: 254.
ASCII value of character  : 255.

--------------------------------
Process exited after 1.219 seconds with return value 33
Press any key to continue . . .

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C Examples Number System Conversion

Why Convert Number Systems?

Real-Time Applications

Binary Number to Decimal and vice-versa

From Binary Number to Hexa-Decimal and vice-versa

Binary Number to Octal and vice-versa

Octal Number to Decimal and vice-versa

Convert Decimal to Binary Number vice-versa

Decimal to Hexa Decimal Number vice-versa

ASCII Value

C Program to Find ASCII Value of a Character

C Program to List out all ASCII Value

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