Python program for octal to decimal conversion

Octal To Decimal Conversion

Here, in this page we will discuss the program for octal to decimal conversion in python . Octal numbers are also called numbers with base 8 and hold values from 0 – 7. Whereas in Decimal numbers are with base 10 is Standard number system for denoting integers and non-integers.

Methods discussed:

1. Algorithmic way (Octal to Decimal)
2. Inbuilt Method (Octal to Decimal)

Algorithm :

• Initialize two variable decimal value and base 0, 1 respectively
• Iterate using while loop until num is greater then 0
• For each iteration het the unit place digit and multiply it with base and add it to decimal value
• divide num by 10 and multiply base with 8

Python Code :

Run
```def OctalToDecimal(num):
decimal_value = 0
base = 1

while num:
last_digit = num % 10
num = int(num / 10)
decimal_value += last_digit * base
base = base * 8
return decimal_value

octal = 512
print("The decimal value of",octal, " is",OctalToDecimal(octal))```

Output :

`The decimal value of 512 is 330`

Method 2 : Inbuilt Method

By using inbuilt function int in Python we can convert any number with any base to decimal.

Python Code

Run
```octal_num = 512

decimal_value = int(str(octal_num), 8)

print("The decimal value of {} is {}".format(octal_num, decimal_value))
```

Output

`The decimal value of 512 is 330`

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One comment on “Python program for octal to decimal conversion”

• Sonal

num=int(input(“Enter the octal number “))
temp=num
deci_val=0
base=1
while(temp):
digit=temp%10
deci_val+=digit*base
base*=8
temp//=10
print(“The decimal value of {} is {}”.format(num,deci_val))