# ‘Awk’ – 4 HackerRank Solution

Hello coders, In this post, you will learn how to solve ‘Awk’ – 4 HackerRank Solution. This problem is a part of the Linux Shell series.

## ‘Awk’ – 4 HackerRank Solution

### Problem

An Introduction to ‘awk’

There are a lot of quick tricks which may be accomplished with the `awk` interpreter. Among other things, awk may be used for a lot of text-munging and data-processing tasks which require some quick scripting work.

Only solutions using awk will be considered valid for this task

You are provided a file with four space-separated columns containing the scores of students in three subjects. The first column, contains a single character (A-Z) – the identifier of the student. The next three columns have three numbers (each between 0 and 100, both inclusive) which are the scores of the students in English, Mathematics and Science respectively.

Input Format

There will be no more than 10 rows of data. Each line will be in the format:
`[Identifier]<space>[Score in English]<space>[Score in Math]<space>[Score in Science]`

Output Format

Concatenate every 2 lines of input with a semi-colon.

Sample Input

A 25 27 50
B 35 37 75
C 75 78 80
D 99 88 76

Sample Output

A 25 27 50;B 35 37 75
C 75 78 80;D 99 88 76

Explanation

Every pair of lines have been concatenated with a semi-colon.

### ‘Awk’ – 4 HackerRank Solution

`awk 'END{ if((NR%2)) print p ";" }!(NR%2){ print p ";" \$0 }{ p = \$0 }'`

Note: This problem  (‘Awk’ – 4) is generated by HackerRank but the solution is provided by Chase2learn. This tutorial is only for Learning and Educational purpose.

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