// exbl3.bal   example  declare and print variable, vector, matrix  
// ballerina run exbl3.bal

import ballerina/io;

public function main (string... args) {
  io:println("exbl3.bal running");

  int n = 3;
  n = n + 3;
  io:println("n=",n);

  float x = 1.0;
  float y = x+2.0;
  io:println("x=",x,", y=",y);

  // This creates an `int` array of length 0.
  int[] a = [];
  io:println("lengthof a = ",a.length());

  // This assigns an array literal.
  int[] b = [1, 2, 3, 4, 5, 6, 7, 8];
  io:println("b[0]) = ",b[0]);
  io:println("b[7]) = ",b[7]);
  io:println("lengthof b = ",b.length());
  foreach int i in 0...7 { io:println("b[",i,"]=",b[i]); }

  // Arrays are unbounded in length.
  // They can grow up to any length based on the given index.
  // In this example, the length of the array is 1000.
  b[999] = 23;
  io:println("b[999] = ",b[999]);
  io:println("lengthof b = ",b.length());

  //This initializes an array of int arrays.
  int[][] iarray = [[1, 2, 3, 4], [10, 20, 30, 40], [5, 6, 7,8]];
  io:println("lengthof iarray =",iarray.length());
  io:println("lengthof iarray[0] = ",iarray[0].length());

  // This initializes the outermost array with the implicit default value.
  iarray = [];
  int[] d = [9];
  iarray[0] = d;
  io:println("lengthof iarray =",iarray.length());
  io:println("lengthof iarray[0] = ",iarray[0].length());

  // This prints the first value of the two-dimensional array.
  io:println("iarray[0][0] = ",iarray[0][0]);

  // This creates a sealed `int` array of length 5.
  int[5] e = [1, 2, 3, 4, 5];
  io:println("lengthof e = ",e.length());

  // This creates a sealed `int` array of length 5
  int[5] f = [0, 0, 0, 0, 0];
  io:println("lengthof f =",f.length());

  // To infer the size of the sealed array from the array literal,
  // following syntax is used.
  int[] g = [1, 2, 3, 4];
  io:println("lengthof g =",g.length());
  io:println("arrays.bal finished");
  
  io:println("exbl3.bal ends");
} // end exbl3.bal