int Java Keyword with Examples

Key points about int Keyword

  1. The int keyword is used to declare a variable as a numeric type. For example, int a = 10;
  2. A int variable is a signed 32-bit type that has a range from –2,147,483,648 to 2,147,483,647.
  3. The Integer class is a wrapper class for the int primitive type. It defines MIN_VALUE and MAX_VALUE constants representing the range of values for this type.

int Java Keyword Example

In the following example, the sum, i and n variables are of type int:
package net.javaguides.corejava.variables;

public class LocalVariableExample {
    public int sum(int n) {
        int sum = 0;
        for (int i = 0; i < n; i++) {
            sum = sum + i;
        return sum;

    public static void main(String[] args) {
        LocalVariableExample localVariableExample = new LocalVariableExample();
        int sum = localVariableExample.sum(10);
        System.out.println("Sum of first 10 numbers -> " + sum);
Sum of first 10 numbers -> 45