In the previous article, we have discussed Python Program to Convert Decimal to Octal using While loop

Given a decimal number and the task is to get the respective binary number for a given number.

**Examples:**

**Example1:**

**Input:**

Given Number = 7

**Output:**

The Binary value of the given decimal number { 7 } is: 111

**Example2:**

**Input:**

Given Number = 9

**Output:**

The Binary value of the given decimal number { 9 } is: 1001

## Program to Convert a Decimal Number to Binary in Python

Below are the ways to convert the given decimal number into Binary :

### Method #1: Using While Loop (Static Input)

**Approach:**

- Give the number as static input and store it in a variable.
- Take a variable say ‘
**a**‘and initialize its value with 1. - Take another variable say
**binry_num**and initialize its value with 0. - Loop till the given number is not equalÂ to zero using the while loop.
- Inside the loop, calculate the value of the given number modulus 2 and store it in a variable
**remdr.** - Divide the given number by 2 and store it in the same variable
**gvn_numb.** - Multiply
**a**with the**remdr**and store it in another variable**b** - Add
**b**to the**binry_num**and convert to int using the int() function. - Store it in the same variable
**binry_num.** - Multiply
**a**with 10 and Store it in the same variable**‘a’.** - Print the
**binry_num**to get the binary value of the given decimal number. - The Exit of the Program.

**Below is the implementation:**

# Give the number as static input and store it in a variable. gvn_numb = 7 # Take a variable say 'a 'and initialize its value with 1. a = 1 # Take another variable say binry_num and initialize its value with 0. binry_num = 0 print("The Binary value of the given decimal number {", gvn_numb, "} is: ") # Loop till the given number is not equalÂ to zero using the while loop. while (gvn_numb != 0): # Inside the loop, calculate the value of the given number modulus 2 and # store it in a variable remdr. remdr = gvn_numb % 2 # Divide the given number by 2 and store it in the same variable gvn_numb. gvn_numb = gvn_numb // 2 # Multiply a with the remdr and store it in another variable b b = (remdr * a) # Add b to the binry_num and convert to int using the int() function. # Store it in the same variable binry_num. binry_num = int(binry_num + b) # Multiply a with 10 and Store it in the same variable 'a'. a = int(a * 10) # Print the binry_num to get the binary value of the given decimal number. print(binry_num)

**Output:**

The Binary value of the given decimal number { 7 } is: 111

### Method #2: Using While loop (User Input)

**Approach:**

- Give the number as user input using the int(input()) function and store it in a variable.
- Take a variable say ‘
**a**‘and initialize its value with 1. - Take another variable say
**binry_num**and initialize its value with 0. - Loop till the given number is not equalÂ to zero using the while loop.
- Inside the loop, calculate the value of the given number modulus 2 and store it in a variable
**remdr.** - Divide the given number by 2 and store it in the same variable
**gvn_numb.** - Multiply
**a**with the**remdr**and store it in another variable**b** - Add
**b**to the**binry_num**and convert to int using the int() function. - Store it in the same variable
**binry_num.** - Multiply
**a**with 10 and Store it in the same variable**‘a’.** - Print the
**binry_num**to get the binary value of the given decimal number. - The Exit of the Program.

**Below is the implementation:**

# Give the number as user input using the int(input()) function and store it in a variable. gvn_numb = int(input("Enter some random Number = ")) # Take a variable say 'a 'and initialize its value with 1. a = 1 # Take another variable say binry_num and initialize its value with 0. binry_num = 0 print("The Binary value of the given decimal number {", gvn_numb, "} is: ") # Loop till the given number is not equalÂ to zero using the while loop. while (gvn_numb != 0): # Inside the loop, calculate the value of the given number modulus 2 and # store it in a variable remdr. remdr = gvn_numb % 2 # Divide the given number by 2 and store it in the same variable gvn_numb. gvn_numb = gvn_numb // 2 # Multiply a with the remdr and store it in another variable b b = (remdr * a) # Add b to the binry_num and convert to int using the int() function. # Store it in the same variable binry_num. binry_num = int(binry_num + b) # Multiply a with 10 and Store it in the same variable 'a'. a = int(a * 10) # Print the binry_num to get the binary value of the given decimal number. print(binry_num)

**Output:**

Enter some random Number = 9 The Binary value of the given decimal number { 9 } is: 1001

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