Update pascalTriangle.js

Author: itsvinayak

maths/pascalTriangle.js

@@ -1,33 +1,31 @@
-let numRows = 5
+const numRows = 5 
 
-var generate = function(numRows) {
- let triangle = [[1], [1,1]]
- 
- if(numRows === 0){
- return []
- } else if(numRows == 1){
- return [[1]] 
- } else if(numRows == 2){
- return [[1], [1,1]]
- } else { 
- for(let i = 2; i < numRows; i++){ 
- addRow(triangle)
- }
- }
- return triangle
- 
-};
-var addRow = function(triangle){
- let previous = triangle[triangle.length - 1]
- let newRow = [1]
- for(let i = 0; i < previous.length - 1; i++){
- let current = previous[i]
- let next = previous[i+1] 
- newRow.push(current + next)
+var generate = function (numRows) {
+ const triangle = [[1], [1, 1]]
+
+ if (numRows === 0) {
+ return []
+ } else if (numRows === 1) {
+ return [[1]]
+ } else if (numRows === 2) {
+ return [[1], [1, 1]]
+ } else {
+ for (let i = 2; i < numRows; i++) {
+ addRow(triangle)
  }
- newRow.push(1)
- return triangle.push(newRow)
- 
+ }
+ return triangle
+}
+var addRow = function (triangle) {
+ const previous = triangle[triangle.length - 1]
+ const newRow = [1]
+ for (let i = 0; i < previous.length - 1; i++) {
+ const current = previous[i]
+ const next = previous[i + 1]
+ newRow.push(current + next)
+ }
+ newRow.push(1)
+ return triangle.push(newRow)
 }
 
 generate(numRows)