# Python Program to print the pattern ‘G’

In this article, we will learn how to print the pattern G using stars and white-spaces. Given a number n, we will write a program to print the pattern G over n lines or rows.

Examples:Â

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Input : 7 Output : *** * * * *** * * * * *** Input : 9 Output : ***** * * * * *** * * * * * * *****

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In this program, we have used the simple logic of iteration over lines to create the pattern G. Please look at the image below which represents the pattern G in the form of a 2-d matrix, where mat[i][j] = ‘ij’:Â

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If we try to analyze this picture with a (row, column) matrix and the circles represent the position of stars in the pattern G, we will learn the steps. Here we are performing the operations column-wise. So for the first line of stars, we set the first if condition, where the row position with 0 and (n-1) won’t get the stars and all other rows from 1 to (n-1), will get the stars. Similarly, for the second, third and fourth column we want stars at the position row = 0 and row = (n-1). The other steps are self-explanatory and can be understood from the position of rows and columns in the diagram.

Below is the implementation of above idea:Â

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## Python

`# Python program to print pattern G ` `def` `Pattern(line): ` ` ` `pat` `=` `"" ` ` ` `for` `i ` `in` `range` `(` `0` `,line): ` ` ` `for` `j ` `in` `range` `(` `0` `,line): ` ` ` `if` `((j ` `=` `=` `1` `and` `i !` `=` `0` `and` `i !` `=` `line` `-` `1` `) ` `or` `((i ` `=` `=` `0` `or` ` ` `i ` `=` `=` `line` `-` `1` `) ` `and` `j > ` `1` `and` `j < line` `-` `2` `) ` `or` `(i ` `=` `=` `((line` `-` `1` `)` `/` `2` `) ` ` ` `and` `j > line` `-` `5` `and` `j < line` `-` `1` `) ` `or` `(j ` `=` `=` `line` `-` `2` `and` ` ` `i !` `=` `0` `and` `i !` `=` `line` `-` `1` `and` `i >` `=` `((line` `-` `1` `)` `/` `2` `))): ` ` ` `pat` `=` `pat` `+` `"*"` ` ` `else` `: ` ` ` `pat` `=` `pat` `+` `" "` ` ` `pat` `=` `pat` `+` `" ` `" ` ` ` `return` `pat ` ` ` `# Driver Code ` `line ` `=` `7` `print` `(Pattern(line)) ` |

Output:Â

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

* Time Complexity:* O(n

^{2}), where n represents the given input.

*O(1), no extra space is required, so it is a constant.*

**Auxiliary Space:**Please refer complete article on Program to print the pattern ‘G’ for more details!

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