Q:

# Write a program in C to check if a number is Keith or not

Write a program in C to check if a number is Keith or not

```Expected Output :
Input a number : 1104
The given number is a Keith Number.```

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``````# include <stdio.h>
# include <stdlib.h>

int lenCount(int nm)
{  int ctr=0;
while(nm>0)
{
nm=nm/10;
ctr++;
}
return ctr;
}

int main()
{
int num1=0,arr1[10],num2=0,flg=0,i=0,sum=0;
printf("\n\n Check whether a number is Keith or not: \n");
printf(" Sample Keith numbers: 197, 742, 1104, 1537, 2208, 2580, 3684, 4788, 7385..\n");
printf(" --------------------------------------------------------------------------\n");
printf(" Input a number : ");
scanf("%d",&num1);
num2=num1;
for(i=lenCount(num2)-1;i>=0;i--)
{
arr1[i]=num1 % 10;
num1/=10;
}
while(flg==0)
{
for(i=0;i<lenCount(num2);i++)
sum+=arr1[i];
if(sum==num2)
{
printf(" The given number is a Keith Number.\n");
flg=1;
}
if(sum>num2)
{
printf(" The given number is not a Keith number.\n");
flg=1;
}
for(i=0;i<lenCount(num2);i++)
{
if(i!=lenCount(num2)-1)
arr1[i]=arr1[i+1];
else
arr1[i]=sum;
}
sum=0;
}
}
``````

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