In fact, I belive 

for(int a = 0; a<10; a++)
{
    printf("%d\n",a);
}

[download]
is equivalent to 
{
    int a = 0;
    while(a<10)
    {
        printf("%d\n",a);
        a++;
    }

[download]
Your other code, 
{
    int a = 0;
    while(a++,a<10)
    {
        printf("%d\n",a);
    }
}

[download]
doesn't run the printf statement with a = 0.

In reply to Re^4: If I was forced to use only one kind of loop for the rest of my days it would be a by ambrus
in thread If I was forced to use only one kind of loop for the rest of my days it would be a by collin

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