Puteti sa-mi ziceti ce face c%2==1 in programul de mai jos ?

int main()
{
int n, k, p=1, c;
cin>>n>>k;
while (n>0 && k>0)
{
c=n%10;
if(c%2==1)
{
p=p*c;
}
n/10;
k-=k;
}
cout<

return 0;