How to print Pyramid Pattern in Swift - Step by Step Examples

How to print Pyramid Pattern in Swift ?

Answer

To print a pyramid pattern in Swift, you can use nested loops to control the number of spaces and asterisks printed on each line. The outer loop controls the rows, while the inner loops control the spaces and asterisks for each row.


✐ Examples

1 Pyramid pattern of height 5

In this example,

  1. We start by defining a constant n with a value of 5, which represents the height of the pyramid.
  2. Next, we use a for loop to iterate from 1 to n. This loop controls the number of rows in the pyramid.
  3. Within the outer loop, we initialize an empty string row to build the content of the current row.
  4. We then use another for loop to add spaces to the row string. The number of spaces is equal to n - i, where i is the current row number. This ensures that the pyramid is centered.
  5. After adding the spaces, we use another for loop to add asterisks to the row string. The number of asterisks is equal to 2 * i - 1, which creates the pyramid shape.
  6. We then print the row string, which represents the current row of the pyramid.

Swift Program

let n = 5
for i in 1...n {
    var row = ""
    for _ in 0..<(n - i) {
        row += " "
    }
    for _ in 0..<(2 * i - 1) {
        row += "*"
    }
    print(row)
}

Output

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

2 Pyramid pattern of height 3

In this example,

  1. We start by defining a constant n with a value of 3, which represents the height of the pyramid.
  2. Next, we use a for loop to iterate from 1 to n. This loop controls the number of rows in the pyramid.
  3. Within the outer loop, we initialize an empty string row to build the content of the current row.
  4. We then use another for loop to add spaces to the row string. The number of spaces is equal to n - i, where i is the current row number. This ensures that the pyramid is centered.
  5. After adding the spaces, we use another for loop to add asterisks to the row string. The number of asterisks is equal to 2 * i - 1, which creates the pyramid shape.
  6. We then print the row string, which represents the current row of the pyramid.

Swift Program

let n = 3
for i in 1...n {
    var row = ""
    for _ in 0..<(n - i) {
        row += " "
    }
    for _ in 0..<(2 * i - 1) {
        row += "*"
    }
    print(row)
}

Output

  *
 ***
*****

Summary

In this tutorial, we learned How to print Pyramid Pattern in Swift language with well detailed examples.


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