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Understanding For-loop in C Language

FOR LOOP.

It allowed specifying three things about a loop is a single line:

  Ø  Setting a loop counter to an initial value.

  Ø  Testing the loop counter to determine whether its value has reached the number of repetitions desired.

  Ø  Increasing the value of loop counter each time the program segment has been executed.


General form of FOR LOOP statement:

It can be seen that three stapes are required for the loop construct have now been incorporated in the FOR LOOP statement:

  Ø  Initialization

  Ø  Testing

  Ø  Incrementation


Execution of FOR LOOP statement:

  Ø  When for statement is executed for the first time, the value of count set to an initial value 1.

  Ø  Now the condition “count<=3” tested. Since count is 1, the condition is satisfied and body of the loop is executed for the first time.

  Ø  Upon reaching the closing brace of for, a computer sends the control back to the for the statement, where the value of count gets incremented by 1.

  Ø  Again the test is performed to check whether the new value of count exceeds 3.

  Ø  The body of the FOR LOOP statement continuous to get executed till count doesn’t exceed the final value 3.

  Ø    When count reach the value 4, the control exits from the loop and is transfer to the statement immediately after the body for FOR LOOP.

 

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