Tag: c conversion programs

In this tutorial, we will write a C program to convert decimal to binary. Before that, you must have knowledge of the following topics in C.

• C operator
• C while loop

Binary number

The binary numbers are based on 0 and 1, so it is a base 2 number. They are the combination of 0 and 1. For example, 1001, 110101, etc.

Decimal Number

These are the numbers with a base of 10, which ranges from 0 to 9. These numbers are formed by the combination of 0 to 9 digits such as 24, 345, etc.

Here is the chart where for the equivalent value of decimal and binary numbers.

Example:

Input: 5
Output: 101

Input: 15
Output: 1111

Now let us go through a program for the conversion of decimal to binary in C using while loop.

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C Program to Convert Decimal to Binary using While loop

#include <stdio.h>
#include <conio.h>

int main()
{
  int deciNum, binaryNum[30], i = 0;

  printf("Enter a decimal number: ");
  scanf("%d", &deciNum);

  while (deciNum != 0)
  {
    binaryNum[i] = deciNum % 2;
    i++;
    deciNum = deciNum / 2;
  }

  printf("Equivalent Binary Value: ");
  for (i = (i - 1); i >= 0; i--)
    printf("%d", binaryNum[i]);

  getch();
  return 0;
}

Output:

Enter a decimal number: 13
Equivalent Binary Number: 1101

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C Program to Convert Decimal to Binary without using Array

Source code: Decimal to Binary without using Array in C.

#include <stdio.h>
#include <conio.h>

int main()
{
  int deciNum, binaryNum = 0, mul = 1, rem;

  printf("Enter any decimal number: ");
  scanf("%d", &deciNum);

  while (deciNum > 0)
  {
    rem = deciNum % 2;
    binaryNum = binaryNum + (rem *mul);
    mul = mul * 10;
    deciNum = deciNum / 2;
  }

  printf("Equivalent Binary Value: %d", binaryNum);

  getch();
  return 0;
}

After the successful execution of the above program, it will produce the same output as the above program.

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In this tutorial, we will write a program to convert binary to decimal in C. Before that, you must have knowledge of the following topics in C.

• C operator
• C while loop

Binary number

The binary numbers are based on 0 and 1, so it is a base 2 number. They are the combination of 0 and 1. For example, 1001, 110101, etc.

Decimal Number

These are the numbers with a base of 10, which ranges from 0 to 9. These numbers are formed by the combination of 0 to 9 digits such as 24, 345, etc.

Here is the chart where for the equivalent value of decimal and binary numbers.

Example:

Input: 101
Output: 5

Input: 111
Output: 7

Now let us go through a program for the conversion of binary to decimal in C using while loop.

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C Program to Convert Binary to Decimal using while loop

In this program a math function pow() is used, it gives the power calculation and a header file math.h is required to add the beginning of the program.

#include <stdio.h>
#include <conio.h>
#include <math.h>

int main()
{
  int binaryNum, deciNum = 0, i = 0, rem;

  printf("Enter a binary number: ");
  scanf("%d", &binaryNum);

  while (binaryNum != 0)
  {
    rem = binaryNum % 10;
    deciNum = deciNum + rem* pow(2, i);
    i++;
    binaryNum = binaryNum / 10;
  }

  printf("Equivalent Decimal Value: %d", deciNum);

  getch();
  return 0;
}

Output:

Enter a binary number: 1111
Equivalent Decimal Value: 15

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Convert Binary to Decimal in C without pow() Function

Although if you do not want to use the pow() function then you simply replace the while loop of the above program with the following while loop code and others remain the same.

while (binnum != 0)
{
  rem = binnum % 10;
  decnum = decnum + (rem *i);
  i = i * 2;
  binnum = binnum / 10;
}

It will produce the same output as the above. Also, you do not need to include math.h header file.

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