Referring to members in arrays

We can directly display the value stored in an array element using the print command, or we can assignit to another variable for further processing inside a AWK program as follows:

$ vi arr_var_assign.awk

BEGIN    {
    arr[10] = "maruti"
    arr[20] = "audi"
    print "arr[10] : " arr[10]
    x=arr[20]

    print "x : " x
    }

$ awk  -f  arr_var_assign.awk

The output of the execution of the preceding code is as follows:

arr[10] : maruti
x : audi

To check whether a particular index exists in an array, we use the if conditionwithin the operator to build the conditional expressionsyntax,as shown in the following syntactical phrase. It will return true(1), if the index exists in the array; otherwise, it will return false(0):

if(index in array)

In the following example, we show you how the if condition works when checking for the existence of an array's index.Here, we declare an array, arr, of five elements, with the index as 10, 20, 30, 40, and 50, respectively. Then...