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email forwarding ) then the array subscript is a string consisting of the concatenation of the (string) value of each expression, separated by the value of the SUBSEP variable. This facility is used to simulate multi- ply dimensioned arrays. For example: i = "A"; j = "B"; k = "C" x[i, j, k] = "hello, world\n" assigns the string "hello, world\n" to the element of the array x which is indexed by the string "A\034B\034C". All arrays in AWK are associative, i.e.
email forwarding indexed by string val- ues. The special operator in may be used in an if or while statement to see if an array has an index consisting of a particular value. if (val in array) print array[val] If the array has multiple subscripts, use (i, j) in array. The in construct may also be used in a for loop to iterate over all the elements of an array. An element may be deleted from an array using the delete statement.
email forwarding The delete statement may also be used to delete the entire contents of an array, just by specifying the array name without a subscript. Variable Typing And Conversion Variables and fields may be (floating point) numbers, or strings, or both. How the value of a variable is inter- preted depends upon its context. If used in a numeric expression, it will be treated as a number, if used as a string it will be treated as a string. To force a variable to be treated as a number, add 0 to it; to force it to be treated as a string, concatenate it with the null string.
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