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C Brain Teasers: Exercise Your Mind

Discussion: Say It Again—Or Not

Execute the code to understand the output and gain insights into do-while loops.

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Run the code

Now, it's time to execute the code and observe the output:

C
#include <stdio.h>
int main()
{
  int a = 11;
  do
  {
    printf("a = %d\n", a);
    a--;
  }
  while(a<10);
  
return(0);
}

Understanding the output

The loop repeats once despite the value of variable a being greater than the loop’s terminating condition:

a = 11
Code output

Explanation

Note: The point of this exercise is to recognize that do-while loops always run at least once, no ...