ABC of Programming
About Lesson

Looping and iteration are essential concepts in programming that allow a block of code to be executed repeatedly based on certain conditions.

There are different types of loops available in most programming languages, including:

  1. While loop: The while loop executes a block of code as long as a specified condition is true. The syntax of the while loop is as follows:

    while (condition) {
    // code to execute while condition is true
  2. For loop: The for loop is used to execute a block of code a specified number of times. The syntax of the for loop is as follows:

    for (initialization; condition; increment/decrement) {
    // code to execute while condition is true

    Here, the initialization statement initializes the loop counter variable, the condition statement specifies the condition for executing the loop, and the increment/decrement statement updates the loop counter variable after each iteration.

  3. Do-while loop: The do-while loop is similar to the while loop, except that it executes the code block at least once, even if the condition is initially false. The syntax of the do-while loop is as follows:

    do {
    // code to execute
    } while (condition);
  4. For-each loop: The for-each loop is used to iterate over the elements of an array or collection. The syntax of the for-each loop is as follows:

    for (type var : array/collection) {
    // code to execute for each element in the array/collection

    Here, type is the data type of the elements in the array or collection, var is a variable that holds the current element, and array/collection is the array or collection to be iterated over.

Iterating over a collection of data is often a common task in programming, and for-each loops can be particularly useful in simplifying this task.

It’s important to note that loops can sometimes be inefficient and can lead to performance issues, particularly if the loop body contains complex operations or if the loop is executed a large number of times. In such cases, alternative approaches like recursion or memoization may be more suitable

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