use IO;

proc main() {
    // Here we create an array 'a' that will hold exactly 5 integers.
    // By default, an array is initialized with the default value of its type,
    // which for integers is 0.
    var a: [1..5] int;
    writeln("emp: ", a);

    // We can set a value at an index using the array[index] = value syntax,
    // and get a value with array[index].
    a[5] = 100;
    writeln("set: ", a);
    writeln("get: ", a[5]);

    // The '.size' property returns the length of an array.
    writeln("len: ", a.size);

    // Use this syntax to declare and initialize an array in one line.
    var b = [1, 2, 3, 4, 5];
    writeln("dcl: ", b);

    // Chapel allows you to create arrays with arbitrary index ranges
    var c: [0..4] int = [1, 2, 3, 4, 5];
    writeln("range: ", c);

    // You can also create sparse arrays where only certain indices are populated
    var d: [1..5] int;
    d[1] = 100;
    d[4] = 400;
    d[5] = 500;
    writeln("sparse: ", d);

    // Chapel supports multidimensional arrays
    var twoD: [1..2, 1..3] int;
    for i in 1..2 {
        for j in 1..3 {
            twoD[i,j] = i + j - 1;
        }
    }
    writeln("2d: ", twoD);

    // You can create and initialize multi-dimensional arrays at once too.
    var twoD2 = [
        [1, 2, 3],
        [1, 2, 3]
    ];
    writeln("2d: ", twoD2);
}