# C/C++ Program to remove all zeros from a number

Write a program to remove all zeros from a integer number in C/C++.

For example,

```Input
809210003
Output
89213```

Steps

1. Take input from the user. Let it be N.
2. Set num = 0. num will store the output.
3. Repeat the following steps while N > 0
• Set R = N % 10. This step stores the right-most digit of N in R.
• Set N = N / 10. This step removes the right-most digit of N.
• If R !=0, Set num = num*10 + R
• If R==0, Do nothing
4. The final answer is stored in num but it is reversed. So, we need to reverse num to get the answer.
```#include<stdio.h>
#include<math.h>

int remove_zeros(int n)
{

int r, num = 0;
// removing zeros from n and storing the number in num
while(n > 0)
{
r = n % 10;
n = n / 10;
if(r!=0)
{
num = num*10 + r;
}
}

// we need to reverse num to obtain final answer since the above loop
// stores digits in num in reverse order
n = num;
num = 0;
while(n>0)
{
r = n % 10;
n = n / 10;
num = num*10 + r;
}

return num;

}

int main()
{
int n;
printf("Enter a Number: ");
scanf("%d", &n);
printf("Number after removing zeros = %d", remove_zeros(n));
}```

Output

``````Enter a Number: 103230023
Number after removing zeros = 132323``````