[previous] 2994 [next] The value of this 'while' or 'for' loop controlling expression is always 'false'. The loop will not be entered.
Invariant operations

The value of the controlling expression in this 'while' or 'for' statement is always zero. The code within the loop is therefore unreachable.

For example: 


/*PRQA S 2017,3120,3199,3201,3227,3356,3359,3408,3447 ++*/

extern int y;

void f1(int x)
{
    int i;
    
    if (x < 10)
    {
        for (i = 20; i < x; ++i)        /* 2994 2996 */
        {
            ++y;                        /* 2880      */
        }
    }
}

MISRA-C:2004 Rules applicable to message 2994:

Rule  13.7  (Required) Boolean operations whose results are invariant shall not be permitted.

See also:

QA·C Source Code Analyser 8.1
MISRA-C:2004 Compliance Module 3.2
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