Java program to concatenate string using for loop

In this tutorial, we are going to write a Java program to concatenate strings using for loop in Java Programming with practical program code and step-by-step full complete explanation.

Java program to concatenate string using for loop.

 
class Join
{
    public static void main(String args[])
    {
        int num = Integer.parseInt(args[0]);
        String result = " ";

        for(int i=1;i<=num;i++)
        {
            result = result + i + " ";
        }
        
        System.out.println(result);
    }
}

Output

 
7
1 2 3 4 5 6 7