﻿ Python: Convert decimal to hexadecimal - w3resource

# Python: Convert decimal to hexadecimal

## Python Basic: Exercise-141 with Solution

Write a python program to convert decimal to hexadecimal.

Sample decimal number: 30, 4
Expected output: 1e, 04

Pictorial Presentation:

Sample Solution-1:

Python Code:

``````# Define an integer variable 'x' with the value 30.
x = 30
# The 'format' function is used with the format specifier '02x' to format 'x' as a 2-character lowercase hexadecimal string.
# It ensures that there are leading zeros to make it 2 characters long.
print(format(x, '02x'))

# Define an integer variable 'x' with the value 4.
x = 4
# The 'format' function is used with the format specifier '02x' to format 'x' as a 2-character lowercase hexadecimal string.
# It ensures that there are leading zeros to make it 2 characters long.
print(format(x, '02x'))
```
```

Sample Output:

```1e
04
```

Sample Solution-2:

Python Code:

``````# Define a function 'dechimal_to_Hex' that converts a decimal number to hexadecimal.

# The function takes an integer 'n' as input.
def dechimal_to_Hex(n):
# Calculate the remainder when 'n' is divided by 16.
x = (n % 16)

# Initialize an empty string 'ch' to store the hexadecimal character.
ch = ""

# Check the value of 'x' to determine the corresponding hexadecimal character.
# For values 0-9, use the integer itself. For values 10-15, use the letters 'A' to 'F'.
if (x < 10):
ch = x
if (x == 10):
ch = "A"
if (x == 11):
ch = "B"
if (x == 12):
ch = "C"
if (x == 13):
ch = "D"
if (x == 14):
ch = "E"
if (x == 15):
ch = "F"

# Check if there are more digits in the number to convert.
if (n - x != 0):
# Recursively call 'dechimal_to_Hex' to convert the remaining digits and append the current hexadecimal character 'ch'.
return dechimal_to_Hex(n // 16) + str(ch)
else:
# If there are no more digits to convert, return the hexadecimal character 'ch'.
return str(ch)

# Define a list of decimal numbers 'dechimal_nums'.
dechimal_nums = [0, 15, 30, 55, 355, 656, 896, 1125]

# Print the original decimal numbers.
print("Decimal numbers:")
print(dechimal_nums)

# Convert and print the hexadecimal representations of the decimal numbers using the 'dechimal_to_Hex' function.
print("\nHexadecimal numbers of the said decimal numbers:")
print([dechimal_to_Hex(x) for x in dechimal_nums])
```
```

Sample Output:

```Dechimal numbers:
[0, 15, 30, 55, 355, 656, 896, 1125]

Hexadechimal numbers of the said dechimal numbers:
['0', 'F', '1E', '37', '163', '290', '380', '465']
```

Flowchart:

Sample Solution-3:

Python Code:

``````# Define a function 'dechimal_to_Hex' that converts a list of decimal numbers to hexadecimal.

# The function takes a list of decimal numbers 'dechimal_nums' as input.
def dechimal_to_Hex(dechimal_nums):
# Define a string 'digits' containing hexadecimal digits.
digits = "0123456789ABCDEF"

# Initialize 'x' with the remainder when 'dechimal_nums' is divided by 16.
x = (dechimal_nums % 16)

# Calculate the integer division of 'dechimal_nums' by 16 and store it in 'rest_part'.
rest_part = dechimal_nums // 16

# Check if 'rest_part' is zero.
if (rest_part == 0):
# If there is no remainder, return the hexadecimal digit corresponding to 'x'.
return digits[x]

# If 'rest_part' is not zero, recursively call 'dechimal_to_Hex' with the 'rest_part' and append the hexadecimal digit corresponding to 'x'.
return dechimal_to_Hex(rest_part) + digits[x]

# Define a list of decimal numbers 'dechimal_nums'.
dechimal_nums = [0, 15, 30, 55, 355, 656, 896, 1125]

# Print the original decimal numbers.
print("Decimal numbers:")
print(dechimal_nums)

# Convert and print the hexadecimal representations of the decimal numbers using the 'dechimal_to_Hex' function.
print("\nHexadecimal numbers of the said decimal numbers:")
print([dechimal_to_Hex(x) for x in dechimal_nums])
```
```

Sample Output:

```Dechimal numbers:
[0, 15, 30, 55, 355, 656, 896, 1125]

Hexadechimal numbers of the said dechimal numbers:
['0', 'F', '1E', '37', '163', '290', '380', '465']
```

Flowchart:

Python Code Editor:

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