Thread: if-else-if statement

When i compile, i get -

MassAndWeight.java:31: error: 'else' without 'if'
else if(weight >= 2000)
^
MassAndWeight.java:35: error: 'else' without 'if'
else
^
2 errors



public class MassAndWeight
{
public static void main(String[] args)
{
// User input
Scanner keyboard = new Scanner(System.in);

double mass;

System.out.print("Enter the object's mass: ");
mass = keyboard.nextDouble();

// Calculate and display
double gravity;
gravity = 9.8F;

double weight;
weight = mass * gravity;

if (weight <= 20)
System.out.print("The object's weight is " + weight + "Newtons.");
System.out.print("The object is too light.");

else if (weight <= 20)
System.out.print("The object's weight is " + weight + "Newtons.");
System.out.print("The object is too light.");

else (weight <= 20)
System.out.print("The object's weight is " + weight + "Newtons.");
System.out.print("The object is too light.");

}
}

Any help is appreciated.

First of all, use <code=java></code> (<> replace with [] respectively).
Next, try to execute this code:

int weight = //initialize it with some number.
if (weight <= 20)
System.out.print("The object's weight is " + weight + "Newtons.");
System.out.print("The object is too light.");

Initialize weight to, say, 0, 10, 20 and 30. Explain what happens.