Use of arrays in Awk Commands in Hindi

Arrays in AWK are versatile data structures that allow you to store and manipulate collections of values. AWK provides support for one-dimensional arrays, and you can use them to perform various text processing and data manipulation tasks. Here’s how you can use arrays in AWK:

Use of arrays in Awk Commands in Hindi

1. Array Declaration:

  • You can declare an array in AWK by simply using it. For example:
    awk myArray[1] = "apple" myArray[2] = "banana"

2. Accessing Array Elements:

  • To access elements of an array, you use the array name followed by the index enclosed in square brackets. For example:
    awk fruit = myArray[1] # Sets 'fruit' to "apple"

3. Iterating Through Arrays:

  • You can use a for loop to iterate through the elements of an array. For example:
    awk for (i in myArray) { print i, myArray[i] }

4. Array Initialization:

  • You can initialize an array when you declare it. For example:
    awk fruits = ["apple", "banana", "cherry"]

5. Length of an Array:

  • To get the number of elements in an array, you can use the length() function. For example:
    awk numFruits = length(myArray) # Sets 'numFruits' to 2

6. Deleting Array Elements:

  • You can delete elements from an array using the delete keyword. For example:
    awk delete myArray[2] # Deletes the second element of 'myArray'

7. Using Arrays for Counting:

  • Arrays are commonly used for counting occurrences of items in text data. For instance, you can count the occurrences of words in a file:
    awk { for (i = 1; i <= NF; i++) { wordCount[$i]++ } } END { for (word in wordCount) { print word, wordCount[word] } }

8. Associative Arrays:

  • In AWK, arrays are associative by default, meaning you can use any string or numeric value as an index, not just consecutive integers.

Arrays in AWK provide a powerful way to store and process data efficiently. They are especially useful for tasks that involve counting, summarizing, or organizing data.

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