how to check if a digit is in a number c code example
Example 1: c isdigit function
isdigit(myChar);
Example 2: c check if char is number
char c = 'a'; // or whatever
if (isalpha(c)) {
puts("it's a letter");
} else if (isdigit(c)) {
puts("it's a digit");
} else {
puts("something else?");
}