Cathy Dinh
while loop to for loops
2 Answer(s)      6 years and 5 months ago
Posted in : Java Beginners

I have to change this while loops to for loops and I was wondering if you could help me out. I got the codes just need to know how to change it.

```    int currentNum= num1;

while(num1>num2){
if (currentNum % 2 == 0){
System.out.print("Even numbers:  "+currentNum);
}
else{
System.out.print("Odd numbers : "+currentNum);
}
}

// output odds number, square of odd numbers and sum of even numbers
System.out.print("Odd Numbers Are: ");

while(num1 <= num2) {
if(num1%2 != 0) {
System.out.print(" "+num1);
sumSquares+=(num1*num1);
}
if(num1%2 == 0) {
sum+=num1;
}
num1++;
}

System.out.println( );
System.out.println("Sum of square of odd numbers are: "+sumSquares);
System.out.println("Sum of even numbers are: "+sum);

System.out.printf("%-10s%-10s%n","Numbers", "Squares");
System.out.printf("%-10s%-10s%n", "------","------");

//while loop to output  1- 10 and there squares
int i=1;
while(i <= 10) {
System.out.printf("%-13s%-13s%n",i,(i*i));
i++;
}

// while loop to output uppercase letter from 'A' - 'Z'
System.out.print("Letters : ");
char letter = 'A';
while (letter <= 'Z'){
System.out.print(" "+letter);
letter++;
}
System.out.println();
```

November 24, 2010 at 12:23 PM

Hi Friend,

```import java.util.*;
public class NumberExample{
public static void main(String[]args){
int sum=0,sumSquares=0;
int num1=0,num2=0;
Scanner input=new Scanner(System.in);
System.out.print("Enter First Number: ");
num1=input.nextInt();

System.out.print("Enter Second Number: ");
num2=input.nextInt();

if(num1>num2){
num1=input.nextInt();
}
else{
System.out.println("Odd Numbers: ");
for(int i=num1;i<=num2;i++){
if(i%2 != 0) {
System.out.println(i);
sumSquares+=(i*i);
}
if(i%2 == 0) {
sum+=i;
}
}
System.out.println("Sum Of Even Numbers: "+sum);
System.out.println("Numbers and their squares between 1 and 10");
for(int i=1;i<=10;i++){
System.out.println(i+"    "+(i*i));
}
System.out.println("Sum Of square of odd Numbers: "+sumSquares);

System.out.print("Letters : ");
char letter = 'A';
for(int i='A';i<='Z';i++){
System.out.print(" "+letter);
letter++;
}
System.out.println();
}
}
}
```

Thanks

November 24, 2010 at 12:23 PM

Hi Friend,

```import java.util.*;
public class NumberExample{
public static void main(String[]args){
int sum=0,sumSquares=0;
int num1=0,num2=0;
Scanner input=new Scanner(System.in);
System.out.print("Enter First Number: ");
num1=input.nextInt();

System.out.print("Enter Second Number: ");
num2=input.nextInt();

if(num1>num2){
num1=input.nextInt();
}
else{
System.out.println("Odd Numbers: ");
for(int i=num1;i<=num2;i++){
if(i%2 != 0) {
System.out.println(i);
sumSquares+=(i*i);
}
if(i%2 == 0) {
sum+=i;
}
}
System.out.println("Sum Of Even Numbers: "+sum);
System.out.println("Numbers and their squares between 1 and 10");
for(int i=1;i<=10;i++){
System.out.println(i+"    "+(i*i));
}
System.out.println("Sum Of square of odd Numbers: "+sumSquares);

System.out.print("Letters : ");
char letter = 'A';
for(int i='A';i<='Z';i++){
System.out.print(" "+letter);
letter++;
}
System.out.println();
}
}
}
```

Thanks

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