magic sum matrix

Author: Manjunath

Data-Structure/Array/2D/magicSum.js

@@ -0,0 +1,45 @@
+'use strict';
+function constructMagicSumMatrix(n) {
+    let matrix = new Array(n);
+    for (let index = 0; index < matrix.length; index++)
+        matrix[index] = new Array(index);
+    for (let i = 0; i < n; i++) {
+        for (let j = 0; j < n; j++) {
+            matrix[i][j] = -1;
+        }
+    }
+    let i = 0,
+        j = parseInt((n / 2)),
+        num = 1;
+    while (num <= (n * n)) {
+        if (i == -1 && j == -1) {
+            i = 1;
+            j = 0;
+        } else {
+            if (i == -1) i = n - 1;
+            if (j == -1) j = n - 1;
+        }
+        if (matrix[i][j] != -1) {
+            i = i + 2;
+            j++;
+            continue;
+        } else matrix[i][j] = num++;
+
+        i--;
+        j--;
+    }
+    return matrix;
+}
+
+function displayMatrix(matrix, n) {
+    for (let i = 0; i < n; i++) {
+        let row = '';
+        for (let j = 0; j < n; j++) {
+            row = row + matrix[i][j] + ' ';
+        }
+        console.log(row);
+    }
+}
+let n = 7;
+let magicMatrix = constructMagicSumMatrix(n);
+displayMatrix(magicMatrix, n);