While Loops

Author: kishanrajput23

21.While_Loops/README.md

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+# Java Tutorial: While Loops in Java
+- In programming languages, loops are used to execute a particular statement/set of instructions again and again.
+- The execution of the loop starts when some conditions become true.
+- For example, print 1 to 1000, print multiplication table of 7, etc.
+- Loops make it easy for us to tell the computer that a given set of instructions need to be executed repeatedly.
+
+### Types of Loops :
+- Primarily, there are three types of loops in Java:
+- While loop
+- do-while loop
+- for loop
+- Let's look into these, one by one.
+
+### While loops :
+- The while loop in Java is used when we need to execute a block of code again and again based on a given boolean condition.
+- Use a while loop if the exact number of iterations is not known.
+- If the condition never becomes false, the while loop keeps getting executed. Such a loop is known as an infinite loop.
+```
+/*
+while (Boolean condition)
+
+{
+
+            // Statements    -> This keeps executing as long as the condition is true.
+
+}
+*/
+```
+- Example
+```
+int i=10;  
+while(i>0){  
+System.out.println(i);  
+i--;  
+}  
+```
+
+### Flow control of while loop :
+
+![image](https://user-images.githubusercontent.com/70385488/151346565-307ba28b-49a1-4f2a-8ae1-3fc1241722ee.png)
+
+**Quick Quiz:** Write a program to print natural numbers from 100 to 200.
+
+### Code as described in the video :
+
+```
+public class cwh_21_ch5_loops {
+    public static void main(String[] args) {
+        System.out.println(1);
+        System.out.println(2);
+        System.out.println(3);
+
+        System.out.println("Using Loops:");
+        int i = 100;
+        while(i<=200){
+            System.out.println(i);
+            i++;
+        }
+        System.out.println("Finish Running While Loop!");
+
+//        while(true){
+//            System.out.println("I am an infinite while loop!");
+//        }
+    }
+}
+```
+
+- This is all for this tutorial, and we will discuss the do-while loop in the next tutorial.
+
+**Handwritten Notes: [Click to Download](https://api.codewithharry.com/media/videoSeriesFiles/courseFiles/java-tutorials-for-beginners-21/Chapter_5.pdf)**
+
+**Ultimate Java Cheatsheet: [Click To Download](https://api.codewithharry.com/media/videoSeriesFiles/courseFiles/java-tutorials-for-beginners-21/UltimateJavaCheatSheet.pdf)**