Assignment in arrays

Array elements can be assigned values like any other AWK variables, as follows:

arr[index] = value

In the following example, we take the cars database file cars.dat. Here, we make the record number the index to the array and store each record as a value to the corresponding array element. The system variable NR is used as the index for the array as it gets incremented for each record.In the end, we print the array elements using a for loop as follows:

$ vi basic_array.awk

{ 
arr[NR] = $0 
}
END{ 
    for ( x=1; x<= NR; x++)
        print "index : "x, "value :"arr[x]
}

$ awk  -f  basic_array.awk  cars.dat

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

index : 1 value :maruti          swift       2007        50000       5
index : 2 value :honda           city        2005        60000       3
index : 3 value :maruti          dezire      2009        3100        6
index : 4 value :chevy           beat        2005        33000       2
index : 5 value :honda...