import java.util.*;
class sum
{
public static void main(String args[])
{
int i,n,sum=0;
Scanner sc = new Scanner(System.in);
System.out.println("Enter value for n:");
n=sc.nextInt();
for(i=1;i<=n;i++)
{
sum=sum+i;
}
System.out.println("sum="+sum);
}
}
class sum
{
public static void main(String args[])
{
int i,n,sum=0;
Scanner sc = new Scanner(System.in);
System.out.println("Enter value for n:");
n=sc.nextInt();
for(i=1;i<=n;i++)
{
sum=sum+i;
}
System.out.println("sum="+sum);
}
}
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