Pascal - Loops
There may be a situation when you need to execute a block of code several number of times. In general statements are executed sequentially: The first statement in a function is executed first, followed by the second, and so on.
Programming languages provide various control structures that allow for more complicated execution paths.
A loop statement allows us to execute a statement or group of statements multiple times and following is the general from of a loop statement in most of the programming languages:
Pascal programming language provides the following types of loop constructs to handle looping requirements. Click the following links to check their detail.
Loop Type | Description |
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while-do loop | Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body. |
for-do loop | Execute a sequence of statements multiple times and abbreviates the code that manages the loop variable. |
repeat-until loop | Like a while statement, except that it tests the condition at the end of the loop body. |
nested loops | You can use one or more loop inside any another while, for or repeat until loop. |
Loop Control Statements:
Loop control statements change execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed.
Pascal supports the following control statements. Click the following links to check their detail.
Control Statement | Description |
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break statement | Terminates the loop or case statement and transfers execution to the statement immediately following the loop or case statement. |
continue statement | Causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating. |
goto statement | Transfers control to the labeled statement. Though it is not advised to use goto statement in your program. |