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Take A QuizWeb Technologies Web Development 2 years ago
Posted on 16 Aug 2022, this text provides information on Web Development related to Web Technologies. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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Web Technologies 0 Answers
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Web Technologies 0 Answers
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manpreet
Best Answer
2 years ago
_x000D_ Incrementing / Decrementing Operators ++ increment operator -- decrement operator Example Name Effect --------------------------------------------------------------------- ++$a Pre-increment Increments $a by one, then returns $a. $a++ Post-increment Returns $a, then increments $a by one. --$a Pre-decrement Decrements $a by one, then returns $a. $a-- Post-decrement Returns $a, then decrements $a by one. These can go before or after the variable. If put before the variable, the increment/decrement operation is done to the variable first then the result is returned. If put after the variable, the variable is first returned, then the increment/decrement operation is done. For example: $apples = 10; for ($i = 0; $i < 10; ++$i) { echo 'I have ' . $apples-- . " apples. I just ate one.\n"; } Live example In the case above ++$i is used, since it is faster. $i++ would have the same results. Pre-increment is a little bit faster because it really increments the variable and after that 'returns' the result. Post-increment creates a special variable, copies there the value of the first variable and only after the first variable is used, replaces its value with second's. However, you must use $apples--, since first, you want to display the current number of apples, and then you want to subtract one from it. You can also increment letters in PHP: $i = "a"; while ($i < "c") { echo $i++; } Once z is reached aa is next, and so on. Note that character variables can be incremented but not decremented and even so only plain ASCII characters (a-z and A-Z) are supported. Stack Overflow Posts: Understanding Incrementing