# setindex!(A::AbstractArray,X,inds...)

setindex!(A, X, inds...)

Store values from array `X` within some subset of `A` as specified by `inds`.

## Examples

``````julia> foo = [-1, -2, -3];
julia> setindex!(foo, 2, 2)
3-element Array{Int64,1}:
-1
2
-3

julia> bar = zeros(2, 2);           # 2x2 array of zeros
julia> setindex!(bar, 42, 2, 1)
2x2 Array{Float64,2}:
0.0   0.0
42.0  0.0``````

In the Julia programming language, the function `setindex!(collection, value, key...)`

Store the given `value` at the given `key` or `index` within a collection. The syntax `a[i,j,...] = x` is converted by the compiler to `(setindex!(a, x, i, j, ...); x)`.

``````julia> arr = [1, 2, 3, 4, 5];
julia> setindex!(arr, 10, 3)
5-element Array{Int64,1}:
1
2
10
4
5``````
1. Set value at a specific index:

``````julia> arr = [1, 2, 3, 4, 5];
julia> setindex!(arr, 10, 3)
5-element Array{Int64,1}:
1
2
10
4
5``````

This example sets the value `10` at index `3` in the array `arr`.

2. Modify a dictionary:

``````julia> dict = Dict("apple" => 10, "banana" => 20, "orange" => 30);
julia> setindex!(dict, 25, "banana")
Dict{String,Int64} with 3 entries:
"apple"  => 10
"banana" => 25
"orange" => 30``````

It sets the value `25` for the key `"banana"` in the dictionary `dict`.

3. Set value at multiple indices:
``````julia> arr = [1, 2, 3, 4, 5];
julia> setindex!(arr, 0, 2, 4)
5-element Array{Int64,1}:
1
0
3
0
5``````

This example sets the value `0` at indices `2` and `4` in the array `arr`.

Common mistake example:

``````julia> arr = [1, 2, 3, 4, 5];
julia> setindex!(arr, 10, 6)
ERROR: BoundsError: attempt to access 5-element Array{Int64,1} at index [6]``````

In this example, the index provided is out of bounds for the array. Ensure that the index is within the valid range of the collection to avoid such errors.