## C Program to draw Number pattern IX

### Description

```Input:
5
Output:
1
23
456
78910
1112131415
78910
456
23
1```

### Solution

```#include<stdio.h>
int main()
{
int i,j,n,num=1,l;
printf("Enter row size:");
scanf("%d",&n);

for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
printf("%d",num);
num++;
}
printf("\n");
}

l=2*n-1;
for(i=1;i<n;i++)
{
num=num-l;
for(j=1;j<=n-i;j++)
{
printf("%d",num);
num++;
}

l=l-2;
printf("\n");
}
return 0;
}```

### Explanation

`Refer Video tutorial`

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