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# Example: do

The following example uses a do-while statement to loop through a string, str, in search of the first non-numeric character.

        int is_digit, i = 0;
        char * str = "1234567k89";
        int len = strlen(str);
        do {
            if (i == len) {
                lr_output_message ("No letters found in string");
                return -1;
            }
            is_digit = isdigit(str[i++]);
        } while (is_digit);
                lr_output_message ("The first letter appears in character %d of str", i);

    Example: Output:
    Action.c(18): The first letter appears in character 8 of str

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