Challenge complete!

src/index.js

@@ -4,7 +4,22 @@
  */
 
 const pascalTriangle = (lineNumber) => {
-
-}
+  const pascalTrianglePerLine = [];            //  Its like a multidimensional array (but really not, is just an array of arrays), saves line per line the pascal triangle to return later que specific line
 
-module.exports = pascalTriangle;
+  for (let i = 0; i <= lineNumber; i++) {
+    let newLine = [];
+    for (let j = 0; j <= i; j++) {
+      if (j === 0 || j === i) {                                 //  The first and last time at the second cicle need have a 1 becaues thats the border of the triangle
+        newLine.push(1);
+      } else {
+        newLine.push(
+          pascalTrianglePerLine[i - 1][j - 1] + pascalTrianglePerLine[i - 1][j]   //  If is not the first line, need to take the top left and top right numbers and add them
+        );
+      }
+    }
+    pascalTrianglePerLine.push(newLine);
+  }
+  return pascalTrianglePerLine[lineNumber];
+};
+
+module.exports = pascalTriangle;