8/2/2023 0 Comments Php switch case break continueIf the defined condition is true, the continue statement is executed to skip the iteration. It is usually used with a condition inside a loop. In the above diagram, a continue statement is used to skip a particular iteration of the loop. For example, in some situations where we want to skip the program's current statement and then starts the next statement, we use the continue statement. As the continue statement is encountered in a loop, it skips the current iteration of the loop and transfers the control to the beginning of the loop for further execution of the loop. The continue statement is used in the middle of for loop, while loop, do-while loop, and the foreach loop. If the condition defined in the loop is true, a break statement is immediately executed to break the execution of the loop and to move the control to the next statement followed by the loop. In the above flow diagram, a break statement is placed inside the loop with a condition. It is also used in the switch case statement to terminate a particular case's execution in the program. It is also used in the nested loop statement, where it breaks the inner loop first and then proceed to break the outer loop. As the break statement encountered inside a loop, it immediately terminated the loop statement and transferred the control to the next statement, followed by a loop to resume the execution. The break statement is used inside the loop (for, foreach, while and do-while) and switch case statement. In this section, we will discuss the differences between break and continue in PHP. These statements are known as jumping statement or flow of transfer in the program. Just like other programming languages, PHP also have two keywords break and continue to control the loop. The statement list for a case can also be empty, which simply passes control into the statement list for the next case.Next → ← prev Difference between break and continue in PHP If your condition is more complicated than a simple compare and/or is in a tight loop, a switch may be faster. In an elseif statement, the condition is evaluated again. In a switch statement, the condition is evaluated only once and the result is compared to each case statement. Thus, it is important not to forget break statements (even though you may want to avoid supplying them on purpose under certain circumstances). You would get the expected behavior (‘i equals 2’ would be displayed) only if $i is equal to 2. Here, if $i is equal to 0, PHP would execute all of the echo statements! If $i is equal to 1, PHP would execute the last two echo statements. If you don’t write a break statement at the end of a case’s statement list, PHP will go on executing the statements of the following case. PHP continues to execute the statements until the end of the switch block, or the first time it sees a break statement. Only when a case statement is found with a value that matches the value of the switch expression does PHP begin to execute the statements. without a break statement, ‘each’ of the lines will execute. You neglected to mention the need for the break statement. The default term is comparable to the else statement. As for the default:, it means that if none of the other conditions are satisfied, do the statements following the default. So, use break at the end of your case block to break out of the switch statement unless you want the following cases to be executed. If we didn’t use break, PHP would continue to execute the other conditions in the switch statement. Finally, we come to the break, which signals the end of the if like statement. After that colon, we have our statements to be executed. Instead, the case is followed by the conditional variable. However, we can see that we do not have to repeat that boring comparison operator over and over. The entire switch is implicitly using the = that we saw in the if statements earlier. The syntax is slightly different than an if statement. Example $x = 3 Ĭase 1: //this statement is the same as if($x = 1)Ĭase 2: //this statement is the same as if($x = 2)Ĭase 3: //this statement is the same as if($x = 3)Ĭase 4: //this statement is the same as if($x = 4)ĭefault: //this statement is the same as if $x does not equal the other conditions The simple syntax of switch statements provide more readable code as opposed to using a lot of else if statements. If statements check one conditional, but switch statements can check for many different cases. As you use them, you will begin to realize why they are much more convenient that writing a whole lot of if statements or elseif statements. The PHP switch statement is pretty much a simplified way to write multiple if statements for one variable.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |