Shell Script to print pyramid of Stars

Q. How do I print pyramid of stars using function in Bash

Ans.

Before writing bash script lets understand how we going to print this pattern. We do it in two part, first we are going to print part 1 and then we print the part 2.

#!/bin/bash
makePyramid()
{
  #Here $1 is the parameter you passed with the function i,e 5
  n=$1;

  #outer loop is for printing number of rows in the pyramid
  for((i=1;i<=n;i++))
  do

      #This loop print spaces required
      for((k=i;k<=n;k++))
      do
        echo -ne " ";
      done

      #This loop print part1 of the the pyramid
      for((j=1;j<=i;j++))
      do
      echo -ne "*";
      done

      #This loop print part 2 of the pryamid.
      for((z=1;z<i;z++))
      do
      echo -ne "*";
      done
      
      #This echo used for printing new line
      echo;
  done
}

#calling function

#change number according to your need
makePyramid 5

Output

Note: You can combine loop of Part1 and Part2 to make it more simple

#!/bin/bash
makePyramid()
{
  #Here $1 is the parameter you passed with the function i,e 5
  n=$1;

  #outer loop is for printing number of rows in the pyramid
  for((i=1;i<=n;i++))
  do

      #This loop print spaces required
      for((k=i;k<=n;k++))
      do
        echo -ne " ";
      done

      #This loop print part1 and part2 of the the pyramid
      for((j=1;j<=2*i-1;j++))
      do
	echo -ne "*"
      done
      
      #This echo used for printing new line
      echo;
  done
}

#calling function

#change number according to your need
makePyramid 5

Output

Enjoy :)

If You Liked This Post Please Take a Time To Share This Post