**The Program in C++ to Convert Octal number to decimal number** **is given below:**

```
#include <iostream>
using namespace std;
int main() {
int octal, decimal = 0, base = 1;
cout << "Hello Codeauri Family,enter an octal number to convert them into decimal equivalent: \n";
cin >>octal;
while (octal > 0) {
int lastDigit = octal % 10;
octal = octal / 10;
decimal += lastDigit * base;
base = base * 8;
}
cout << "Well,the decimal equivalent is: " << decimal << endl;
return 0;
}
```

## Output:

Hello Codeauri Family,enter an octal number to convert them into decimal equivalent:

7

Well,the decimal equivalent is: 7

## Pro-Tips**💡**

This program prompts the user to enter an octal number, then uses a while loop to convert the number to decimal. The decimal equivalent is then output to the console.

The program uses the following algorithm:

- Read the octal number from right to left (starting with the least significant digit)
- If the digit is n, add 8^n to the decimal where n is the position of the digit from the right.
- Repeat the above steps for all digits.
- The final decimal number is the decimal equivalent of the octal number.

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