Synopsis

(Required) Numeric variables being used within a for loop for iteration counting shall not be modified in the body of the loop.

Enabled by default

Yes

Severity/Certainty

Low/High

Full description

A for loop counter variable was found that is modified in the body of the loop. This check is identical to MISRAC++2008-6-5-3.

Coding standards

Code examples

The following code example fails the check and will give a warning:

int main(void) {
  int i;

  /* i is incremented inside the loop body */
  for (i = 0; i < 10; i++) {
    i = i + 1; 
  }

  return 0;
}

The following code example passes the check and will not give a warning about this issue:

int main(void) {
  int i;
  int x = 0;
    
  for (i = 0; i < 10; i++) {
    x = i + 1;
  }

  return 0;
}