Q1: Print a Right-Aligned Star Triangle Pattern

Problem:

• Given a number n, print a right-aligned triangle of stars (*) with n rows. The stars in each row should increase from 1 to n, and the triangle should be aligned to the right side by adding spaces before the stars.

Example:

For n = 5, the output should be:

    *
   **
  ***
 ****
*****

Approach

• Use an outer loop to iterate over each row.

• For each row:

  • Print spaces first. The number of spaces is n - (current_row + 1).
  • Then print stars. The number of stars is current_row + 1.

• Move to the next line after printing each row.

Example Code

function printRightAlignedTriangle(n) {
  let Stars = "";

  for (let i = 0; i < n; i++) {
    // Print spaces
    for (let x = 0; x < n - (i + 1); x++) {
      Stars += " ";
    }
    // Print stars
    for (let j = 0; j < i + 1; j++) {
      Stars += "*";
    }
    Stars += "n"; // New line after each row
  }

  return Stars;
}

console.log(printRightAlignedTriangle(5));

Explanation

• The outer loop runs from 0 to n - 1, representing each row.

• Spaces decrease as the row number increases.

• Stars increase by one each row.

• Using nested loops, we build the pattern string line by line.