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Program to Convert Decimal to Octal

Program to Convert Decimal to Octal

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  • Write a program to Convert Decimal to Octal in C
  • Write a program to Convert Decimal to Octal in C++
  • Write a program to Convert Decimal to Octal in Python
  • Write a program to Convert Decimal to Octal in PHP
  • Write a program to Convert Decimal to Octal in Java
  • Write a program to Convert Decimal to Octal in Java Script
  • Write a program to Convert Decimal to Octal in C#

Explanation:

A decimal number (base 10) is converted to its octal equivalent (base 8) using the following logic: repeatedly divide the number by 8 and note the remainders. The octal digits in reverse order are represented by these remainders.

Steps for Decimal to Octal Conversion:

  1. Start with the decimal number.
    • For example: n = 83
  2. Divide the number by 8.
    • Record the remainder (it will be between 0 and 7). This remainder is an octal digit.
  3. Update the number as the quotient of the division.
    • Repeat the division process until the quotient becomes 0.
  4. The octal number is the sequence of remainders read in reverse order.

Example Conversion:

Convert 83 to octal:

  1. 83 ÷ 8 = 10 remainder 3 → Octal digit: 3
  2. 10 ÷ 8 = 1 remainder 2 → Octal digit: 2
  3. 1 ÷ 8 = 0 remainder 1 → Octal digit: 1

Octal equivalent (reversed remainders): 123

Program to Convert Decimal to Octal

#include <stdio.h>
void decimalToOctal(int n) {
    int octalNum[32];
    int i = 0;
    while (n > 0) {
        octalNum[i] = n % 8;
        n = n / 8;
        i++;
    }
    for (int j = i - 1; j >= 0; j--)
        printf("%d", octalNum[j]);
}
int main() {
    int n;
    printf("Enter a decimal number: ");
    scanf("%d", &n);
    printf("Octal: ");
    decimalToOctal(n);
    return 0;
}


#include <iostream>
using namespace std;

void decimalToOctal(int n) {
    string octal = "";
    while (n > 0) {
        octal = to_string(n % 8) + octal;
        n /= 8;
    }
    cout << octal;
}

int main() {
    int n;
    cout << "Enter a decimal number: ";
    cin >> n;
    cout << "Octal: ";
    decimalToOctal(n);
    return 0;
}

def decimal_to_octal(n):
    return oct(n).replace("0o", "")

n = int(input("Enter a decimal number: "))
print("Octal:", decimal_to_octal(n))


<?php
function decimalToOctal($n) {
    echo decoct($n);
}
$n = (int)readline("Enter a decimal number: ");
echo "Octal: ";
decimalToOctal($n);
?>


import java.util.Scanner;

public class DecimalToOctal {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a decimal number: ");
        int n = sc.nextInt();
        System.out.println("Octal: " + Integer.toOctalString(n));
    }
}


function decimalToOctal(n) {
    return n.toString(8);
}

const n = parseInt(prompt("Enter a decimal number: "));
console.log("Octal:", decimalToOctal(n));


using System;

class DecimalToOctal {
    static void Main() {
        Console.Write("Enter a decimal number: ");
        int n = int.Parse(Console.ReadLine());
        Console.WriteLine("Octal: " + Convert.ToString(n, 8));
    }
}

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