Decimal to binary in C: We can convert any decimal number (base-10 (0 to 9)) into binary number(base-2 (0 or 1)) by c program.

## Decimal Number

Decimal number is a base 10 number because it ranges from 0 to 9, there are total 10 digits between 0 to 9. Any combination of digits is decimal number such as 23, 445, 132, 0, 2 etc.

## Binary Number

Binary number is a base 2 number because it is either 0 or 1. Any combination of 0 and 1 is binary number such as 1001, 101, 11111, 101010 etc.

Let’s see the some binary numbers for the decimal number.

Decimal | Binary |
---|---|

1 | 0 |

2 | 10 |

3 | 11 |

4 | 100 |

5 | 101 |

6 | 110 |

7 | 111 |

8 | 1000 |

9 | 1001 |

10 | 1010 |

## Decimal to Binary Conversion Algorithm

- Step 1: Divide the number by 2 through % (modulus operator) and store the remainder in array
- Step 2: Divide the number by 2 through / (division operator)
- Step 3: Repeat the step 2 until number is greater than 0

Let’s see the c example to convert decimal to binary.

- #include<stdio.h>
- #include<conio.h>
- main()
- {
- int a[10],n,i;
- clrscr();
- printf(“Enter the number to convert: “);
- scanf(“%d”,&n);
- for(i=0;n>0;i++)
- {
- a[i]=n%2;
- n=n/2;
- }
- printf(“\nBinary of Given Number is=”);
- for(i=i-1;i>=0;i–)
- {
- printf(“%d”,a[i]);
- }
- getch();
- }

Output:

Enter the number to convert: 5 Binary of Given Number is=101