# Write a Program to convert decimal to Octal in C Language

Write a Program to convert decimal to OCTAL in C Language

Decimal to octal conversion method:

Step 1: Divide the original decimal number by 8

Step 2: Divide the quotient by 8

Step3: Repeat the step 2 until we get quotient equal to zero.

Result octal number would be remainders of each step in the reverse order.

Decimal to octal conversion with example:

For example we want to convert decimal number 525 in the octal.

Step 1: 525 / 8 Remainder : 5 , Quotient : 65

Step 2: 65 / 8 Remainder : 1 , Quotient : 8

Step 3: 8 / 8 Remainder : 0 , Quotient : 1

Step 4: 1 / 8 Remainder : 1 , Quotient : 0

So equivalent octal number is: 1015

That is (525)10 = (1015)8

#include<stdio.h>

int main(){

long int decimalNumber,remainder,quotient;

int octalNumber[100],i=1,j;

printf(“Enter any decimal number: “);

scanf(“%ld”,&decimalNumber);

quotient = decimalNumber;

while(quotient!=0){

octalNumber[i++]= quotient % 8;

quotient = quotient / 8;

}

printf(“Equivalent octal value of decimal number %d: “,decimalNumber);

for(j = i -1 ;j> 0;j–)

printf(“%d”,octalNumber[j]);

return 0;

}

Sample output:

Enter any decimal number: 50

Equivalent octal value of decimal number 50: 62

- Easy way to convert decimal number to octal number in c

int main(){long int decimalNumber;printf(“Enter any decimal number : “);

scanf(“%d”,&decimalNumber);

printf(“Equivalent octal number is: %o”,decimalNumber);

return 0;

}

Sample output:

Enter any decimal number: 25

Equivalent octal number is: 31

Octal number system: It is base 8 number system which uses the digits from 0 to 7.

Decimal number system:

It is base 10 number system which uses the digits from 0 to 9