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Introduction
A square star pattern consists of stars (*) arranged in a grid format to form a square. Each row contains the same number of stars as the number of rows, making it a simple and easy-to-understand pattern. This exercise is useful for practicing loops and formatting output in JavaScript.
Problem Statement
Create a JavaScript program that:
- Accepts the size of the square (i.e., the number of rows and columns).
- Prints a square star pattern using stars (
*).
Example:
- Input:
size = 5 - Output:
***** ***** ***** ***** *****
Solution Steps
- Input the Size of the Square: The user specifies the size of the square (i.e., how many rows and columns it should have).
- Use Nested Loops: The outer loop handles the rows, and the inner loop handles printing the stars for each row.
- Display the Square Star Pattern: Print a fixed number of stars in each row based on the size.
JavaScript Program
// Step 1: Input the size of the square
let size = parseInt(prompt("Enter the size of the square: "));
// Step 2: Outer loop for rows
for (let i = 1; i <= size; i++) {
let output = '';
// Step 3: Inner loop to print stars for each row
for (let j = 1; j <= size; j++) {
output += '*';
}
// Print the output for the current row
console.log(output);
}
Explanation
Step 1: Input the Size of the Square
- The program starts by asking the user for the size of the square. The input is converted to an integer using
parseInt().
Step 2: Outer Loop for Rows
- The outer loop controls how many rows are printed. It runs from
1tosize, where each iteration represents a row.
Step 3: Inner Loop for Stars
- The inner loop controls how many stars (
*) are printed in each row. The number of stars printed in each row is equal tosize.
Step 4: Output the Row
- After constructing the row with stars, it is printed using
console.log().
Output Example
For size = 5, the output will be:
*****
*****
*****
*****
*****
For size = 4, the output will be:
****
****
****
****
Conclusion
This JavaScript program prints a square star pattern using nested loops. Each row contains a fixed number of stars, and the same pattern is repeated for the given number of rows. This exercise is useful for practicing loop control and output formatting in JavaScript.
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