how to declare array within class in typescript code example

Example: typing arrays

// Arrays are variables containing multiple pieces of data.

myArray = ["value1", 2, 3, "insert fourth value here"];

// To retrieve data, you reference them via index numbers.
// KEEP IN MIND that when referencing array values, index numbers
// start at 1, not zero.

myArray[0] = "value1";
myArray[1] = 2;
myArray[3] = "insert fourth value here";