Determine if char is a num or letter

by

You’ll want to use the isalpha() and isdigit() standard functions in <ctype.h>.

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?");
}

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