while(1)
    {
        if (var1 & 0x20)	/* check bit 5 (6th bit) of var1 */
            var2 = 0x55;	/* this statement is executed if bit 5 is a 1 */	
        else
            var2 = 0xAA;	/* this statement is executed if bit 5 is a 0 */
    }