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$ curl repovive.com/roadmaps/go/arrays-slices/creating-2d-slices

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$ curl repovive.com/roadmaps/go/arrays-slices/creating-2d-slices

Repovive

Creating 2D Slices - Arrays & Slices | Go | Repovive

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Go10 sections · 431 units20h total

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Creating 2D Slices

Dynamic allocation

To create a $2$ D slice dynamically, allocate each row separately:

rows := 3
cols := 4
matrix := make([][]int, rows)
for i := range matrix {
    matrix[i] = make([]int, cols)
}

This creates a $3$ by $4$ matrix initialized to zeros. Each row is its own slice with independent memory. The outer slice holds pointers to these row slices.