spiral.js

(function(){
    function sprial(matrix,rows,cols){
        left=0;right =cols-1;
        let top =0, bottom =rows-1;
        // while(left <=right &&top<=bottom){
            for(let i =left;i<right;i++){
                console.log(matrix[top][i]);

            }
            top++

            
            for(let i =top;i<bottom;i++){
                console.log(matrix[i][right]);
            }
            right--; 

             if(top<bottom)

            for(let i =top;i>left;i--){
                console.log(matrix[bottom][i]);
            }
            bottom--;
            }
            if(left<right){

            for(let i =bottom;i>top;i--){
                console.log(matrix[i][left]);
            }
            }
            left++
        
            




    
    let matrix=[[1,2,3,4],[5,6,7,8],[9,10,11,12]]
    console.log(sprial(matrix 3,4))

})();