Answer to Question #255785 in Java | JSP | JSF for Sayem

Question

Hey, I hope you are well.

Can you explain me the conversion from for loop to while loop vice versa in Python and Java? (As well as giving the examples of Recursive Function or Fruitful Functions)

Answer 1

public class ForAndWhile {


	public static void main(String[] args) {


		int n = 10;
		while (n > 0) {
			System.out.println("Tic " + n--);
		}
//		For loop consist of four parts: loop control variable, loop condition, increment/decrement and the loop body. The first three are separated by semicolon.
//
//		for ( variable ; condition ; Increment/Decrement ){
//
//		Body
//
//		}
//
//		In order to convert for loop to while loop in C just move the loop control variable above the while and Increment/decrement expression inside the loop.


//		Loop control variable initialization;
		for (int i = 0; i >= n; i++) {
			System.out.println("Toe " + n--);
		}
	}
}



Unlike while loop, for loop in Python doesn't need a counting variable to keep count of number of iterations. Hence, to convert a for loop into equivalent while loop, this fact must be taken into consideration.

Following is a simple for loop that traverses over a range

for x in range(5):
     print (x)



To convert into a while loop, we initialize a counting variable to 0 before the loop begins and increment it by 1 in every iteration as long as it is less than 5

x=0
while x<5:
     x=x+1
     print (x)