do

The do...while construct provides an iterative loop. Use it in conjunction with the while keyword.

do statement... while( expression ); 

statement is executed repeatedly as long as expression is true. The test on expression takes place after each execution of statement.

Example

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