；JavaScriptThis time no story, no theory. The examples below show you how to write function accum: Examples: accum("abcd") -> "A-Bb-Ccc-Dddd" accum("RqaEzty") -> "R-Qq-Aaa-Eeee-Zzzzz-Tttttt-Yyyyyyy" accum("cwAt") -> "C-Ww-Aaa-Tttt"

Sure! Here's an example of how you can write the `accum` function in JavaScript:

function accum(str) {
  // Convert the string to lowercase
  str = str.toLowerCase();

  // Create an empty array to store the result
  var result = [];

  // Iterate over each character in the string
  for (var i = 0; i < str.length; i++) {
    // Create a string with the current character repeated i+1 times
    var repeat = str[i].repeat(i + 1);

    // Capitalize the first character of the repeated string
    repeat = repeat.charAt(0).toUpperCase() + repeat.slice(1);

    // Push the repeated and capitalized string to the result array
    result.push(repeat);
  }

  // Join the elements of the result array with hyphens
  return result.join("-");
}

console.log(accum("abcd")); // Output: "A-Bb-Ccc-Dddd"
console.log(accum("RqaEzty")); // Output: "R-Qq-Aaa-Eeee-Zzzzz-Tttttt-Yyyyyyy"
console.log(accum("cwAt")); // Output: "C-Ww-Aaa-Tttt"

The `accum` function takes a string as input and returns a modified string where each character is repeated a number of times based on its position in the string. The first occurrence of the character is capitalized, and all repetitions are separated by hyphens.