stevenTan - 7 months ago 13

Java Question

Sorry i'm stuck on converting this to do while loop can anybody help me please. Thanks.

`int sum = 0;`

int num;

System.out.print("Enter number: ");

num = sc.nextInt();

// Store the user input into variable num

// Complete the for loop to start from 1

// and end at num

for ( int i = 1 ; i <=num ; i++ )

sum += i;

System.out.println("The sum is " + sum);

and this is my do while loop

`int sum = 0;`

int num;

int i = 1;

do{

sum += i;

System.out.print("Enter number: ");

num = sc.nextInt();

i++;

}

while ( i <=num );

System.out.println("The sum is " + sum);

Answer

```
int sum = 0;
int num;
int i = 0;
System.out.print("Enter number: ");
num = sc.nextInt();
do{
sum += i;
i++;
}
while ( i <=num );
System.out.println("The sum is " + sum);
```

Initialize i to zero, since do-while does first before checking, as opposed to for that checks first before doing. And your do-while will work the same as your for.Or else your do-while will have a sum of 1 even if your num is 0. As opposed to your for that will have sum=0 if num is 0.