Print pyramid pattern: 1 3*2 4*5*6 pattern in java

In this post, we will see how to print the following pyramid pattern.


Problem

Input : n = 4
Output :
1
3*2
4*5*6
10*9*8*7Input : n = 5
Output :
1
3*2
4*5*6
10*9*8*7
11*12*13*14*15

Solution

If you notice the pattern we need to print odd rows in increasing order and even rows in decreasing order.
We will use two for loops and three variables to achieve this pattern.
Three variables:

  • row: It denotes to current row
  • col: It is the number which you actually prints
  • num: It actually controls the number upto which you are going to print in a row.

Java program to print 1 3*2 4*5*6 pattern in java

Time Compexity: O((n (n + 1)) / 2)
That’s all about printing the pattern 1 3
2 456 pattern in java.

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