Last Updated: 25 Nov, 2020

Star Pattern

Easy

Asked in companies

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Problem statement

Print the following pattern

Pattern for N = 4

The dots represent spaces.

Input Format:

The first line contains a single integer ‘T’ representing the number of test cases. 

The first line of each test case will contain an integer ‘N’ that is the total number of rows.

Output Format:

For each test case, print the pattern of N lines.

Output for every test case will be printed in a separate line.

Constraints :

1 <= T <= 100
1 <= N <= 100

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Approaches

01 Approach

The basic idea of this approach is to print the pattern row-wise. The pattern consists of ’N’ rows. Each row contains 2 * ‘N’ - 1 star. In addition to these stars, there are leading spaces. Each row contains ‘N’ - ‘Row’ spaces (where ‘ROW’ is the current row number).

Here is the algorithm:

Run a loop for ‘ROW’ = 0 to ‘N’:
- To print spaces, create a variable ‘SPACES’ and run a loop till ’N’ - ‘ROW.’
- To print the stars ‘*’, run another loop from 1 to 2 * ‘ROW’ - 1:
  - Inside the loop print the star.
- Print a new line.

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