What is currying in F#? [duplicate]

Answer 1

Just to add to the other answers, underneath the hood a closure is returned when you curry the function.

[Serializable]
internal class addToFive@12 : FSharpFunc
{
    // Fields
    [DebuggerBrowsable(DebuggerBrowsableState.Never), CompilerGenerated, DebuggerNonUserCode]
    public int x;

    // Methods
    internal addToFive@12(int x)
    {
        this.x = x;
    }

    public override int Invoke(int y)
    {
        return Lexer.add(this.x, y);
    }
}