1. Right-Angled Triangle
A right-angled triangle prints stars row-wise, increasing with each row.
- Use a loop for each row.
- Print number of stars equal to row number.
- Use nested loops for printing stars.
Example: 5 rows
2. Pyramid Pattern
Pyramid pattern prints stars in the shape of a pyramid.
- Use nested loops: outer for rows, inner for spaces and stars.
- Increase stars by 2 in each row.
- Center align using spaces.
Example: 5 rows
3. Number Pyramid
A pyramid pattern printing numbers increasing from left to right.
- Outer loop for rows.
- Inner loop prints numbers sequentially.
- Use spaces for alignment.
Example: 5 rows
4. Inverted Pyramid
Inverted pyramid prints stars in decreasing order to form an inverted shape.
- Outer loop for rows.
- Inner loop prints spaces and stars.
- Decrease stars by 2 each row.
Example: 5 rows
5. Diamond Star Pattern
Diamond pattern combines pyramid and inverted pyramid.
- Use two loops: one for top pyramid, one for bottom inverted pyramid.
- Adjust spaces and stars for symmetry.
Example: 5 rows top pyramid
6. Number Pyramid
Let's print a centered number pyramid (1, 121, 12321, ...). This pattern helps you practice nested loops and see how numbers and spacing work together to create neat shapes. Change the `rows` variable to try different sizes.
- Choose how many rows you want (variable `rows`).
- For each row: first print leading spaces to center the pattern.
- Then print ascending numbers from 1 up to the row number.
- Then print descending numbers from row-1 back to 1 to make a palindrome.
- Print each row with one console.log so it appears line-by-line in the output box.
Example for rows = 5: outputs
1
121
12321
1234321
123454321
7. Floyd’s Triangle
Floyd's Triangle prints numbers in a continuous sequence in triangle shape.
- Use a counter starting from 1.
- Outer loop for rows.
- Inner loop prints numbers and increments counter.
Example: 5 rows
8. Right Pascal’s Triangle
Right Pascal's Triangle is a combination of a normal and inverted right-angled triangle.
- Print a right-angled triangle first.
- Then print inverted right-angled triangle excluding the last row.
Example: 5 rows top triangle
9. Pascal’s Triangle
Pascal's Triangle prints numbers where each number is the sum of the two numbers above it.
- Start with 1 at the top.
- Use nested loops to generate next row from previous row.
- Use combination formula or iterative addition.
Example: 5 rows
10. Hollow Diamond Pattern
Hollow Diamond prints a diamond with empty space inside, using stars at borders.
- Use nested loops for top and bottom pyramid.
- Print stars at first and last positions, spaces in between.
- Ensure symmetry for hollow effect.
Example: 5 rows top pyramid