Kdtyjb

I am in the midst of making a flow chart.

Currently, I have:

documentclass{article}

usepackage[utf8]{inputenc}

usepackage{tikz}

usetikzlibrary{shapes.geometric,arrows,amsmath}



tikzstyle{process}=[rectangle,minimum width=3cm,minimum height=1cm, text centered, draw=black, fill=orange!30]

tikzstyle{decision}=[diamond,minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30]



tikzstyle{arrow}=[thick,->,>=stealth]



    begin{document}



    begin{tikzpicture}[node distance=2cm]

        node (start) [process] {

        $text{A}_{it}$

        };



        node (in1) [process, below of=start] {$text{B}_{it}$};

        node (in2) [process, below of=in1] {$text{C}_{it}$};

        node (pro2) [decision, right of=in1, xshift=2cm] {$text{ D}_{it}$};

        draw [arrow] (start)--(pro2);

        draw [arrow] (in1)--(pro2);

        draw [arrow] (in2)--(pro2);

    end{tikzpicture}

    end{document}

This connects three nodes A, B, C to D.

Now, I wish to create another node, E, to the right of D, but instead of an arrow, I want to add the plus symbol.

Is there any way to do this?

Like this ?

documentclass{article}

usepackage[utf8]{inputenc}

usepackage{tikz,amsmath}

usetikzlibrary{shapes.geometric,arrows.meta,positioning}



tikzstyle{process}=[rectangle,minimum width=3cm,minimum height=1cm, text centered, draw=black, fill=orange!30]

tikzstyle{decision}=[diamond,minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30]



tikzstyle{arrow}=[thick,->,>=stealth]



    begin{document}



    begin{tikzpicture}[node distance=2cm]

        node (start) [process] {

        $text{A}_{it}$

        };



        node (in1) [process, below of=start] {$text{B}_{it}$};

        node (in2) [process, below of=in1] {$text{C}_{it}$};

        node (pro2) [decision, right= 2cm of in1] {$text{ D}_{it}$};

        node (pro3) [decision, right= 2cm of pro2] {$text{ E}_{it}$};

        draw [arrow] (start)--(pro2);

        draw [arrow] (in1)--(pro2);

        draw [arrow] (in2)--(pro2);

        draw (pro2) edge node[draw,fill=white,circle]{+} (pro3);

    end{tikzpicture}

    end{document}

addendum

tikzstyle is deprecated since the version 2.10 of tikz, you must use tikzset
which give :

documentclass{article}

usepackage[utf8]{inputenc}

usepackage{tikz,amsmath}

usetikzlibrary{shapes.geometric,arrows.meta,positioning}



%tikzstyle{process}=[rectangle,minimum width=3cm,minimum height=1cm, text centered, draw=black, fill=orange!30]

%tikzstyle{decision}=[diamond,minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30]

%

%tikzstyle{arrow}=[thick,->,>=stealth]



tikzset{

    process/.style={rectangle,minimum width=3cm,minimum height=1cm, text centered, draw=black, fill=orange!30},

    decision/.style={diamond,minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30},

        }

    begin{document}



    begin{tikzpicture}[node distance=2cm,arrows={-stealth},thick]

        node (start) [process] { $text{A}_{it}$ };



        node (in1) [process, below of=start] {$text{B}_{it}$};

        node (in2) [process, below of=in1] {$text{C}_{it}$};

        node (pro2) [decision, right= 2cm of in1] {$text{ D}_{it}$};

        node (pro3) [decision, right= 2cm of pro2] {$text{ E}_{it}$};

        draw [->] (start)--(pro2);

        draw [->] (in1)--(pro2);

        draw [->] (in2)--(pro2);

        draw (pro2) edge node[fill=white]{+} (pro3);

    end{tikzpicture}

    end{document}