Star Pattern Program in Hindi Programming

The program

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star-pattern.altf

// Star pattern: ek pyramid aur ek ulta triangle

rakho rows = 5;

bol("Pyramid:");
chalo (rakho i = 1; i <= rows; i = i + 1) {
  rakho line = "";
  chalo (rakho s = 0; s < rows - i; s = s + 1) {
    line = line + " ";
  }
  chalo (rakho k = 0; k < 2 * i - 1; k = k + 1) {
    line = line + "*";
  }
  bol(line);
}

bol("Ulta triangle:");
chalo (rakho i = rows; i >= 1; i = i - 1) {
  rakho line = "";
  chalo (rakho k = 0; k < i; k = k + 1) {
    line = line + "* ";
  }
  bol(line);
}

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Expected output

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Pyramid:    *   ***  ***** ****************Ulta triangle:* * * * * * * * * * * * * * *

How it works

Each row of the pyramid is built as a string before it is printed. Row i needs rows - i spaces and then 2 * i - 1 stars, so the shape widens by two stars per row and stays centred.

The inverted triangle counts down instead: the loop starts at rows and uses i = i - 1. Each row prints i copies of "* ".

Pattern programs are good practice for nested loops: the outer loop picks the row, the inner loops decide what goes in it.

The program

How it works

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