Question

Basic While Loop Expression.

a) Explain the syntax of a while loop
b) Implement a nested while loop
c) Compare while and for loops
d) Discuss the applications of a while loop

Answer 1

This answer explains the syntax of a while loop, provides an example of a nested while loop, compares while and for loops, and discusses the applications of a while loop.

Step-by-step explanation:

A while loop is a control flow statement that repeatedly executes a block of code as long as a specified condition is true. The syntax of a typical while loop in most programming languages is as follows:

while (condition) {
// code to be executed

A nested while loop is a while loop inside another while loop. Here's an example:

int i = 1;
while (i <= 3) {
int j = 1;
while (j <= 3) {
System.out.println(i + " " + j)

The main difference between while and for loops is their syntax and the way they control the execution of code. While loops are typically used when the number of iterations is not known in advance, while for loops are used when the number of iterations is known.

While loops are commonly used in programming to iterate through items in a collection, process user input, or perform repetitive tasks until a certain condition is met. They are especially useful when looping indefinitely until a break condition is encountered, or when performing tasks that require continuous monitoring.