This function is used to check whether a given character is a digit or not. This function will return 1 if the given character is a digit, and 0 otherwise.
Example:
using namespace std;
#include
#include int main( )
{
char ch;
cout <<“\n Enter a Character:”; cin>> ch;
cout << “\n The Return Value of isdigit(ch) is << isdigit(ch);
}
Output – 1
Enter a Character: 3
The Return Value of isdigit(ch) is : 1
Output – 2
Enter a Character: A
The Return Value of isdigit(ch) is :0