Checking if PassCode Contains a Digit

[ksepe]

Set hasDigit to true if the 3-character passCode contains a digit. My attempt is bolded. It is not recognizing number's

#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <ctype.h>

int main(void) {
   bool hasDigit = false;
   char passCode[50] = "";
   int valid = 0;

   strcpy(passCode, "abc");

[B]   /* Your solution goes here  */
   int i=0;
for (i=0; i<3; i++) {
   hasDigit=isdigit(i);
   if(hasDigit) {
      hasDigit=true;
   }
}[/B]
   if (hasDigit) {
      printf("Has a digit.\n");
   }
   else {
      printf("Has no digit.\n");
   }

   return 0;
}

 

[MarkFL]

You may find this thread useful:

http://mathhelpboards.com/computer-science-58/c-determining-if-string-contains-any-numeric-digits-17748.html