Add day 15

day15/README.md

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+![cover](./cover.png)
+
+# Day 15 - Recursion Series Part C
+
+Today's Problem - Pascal's Triangle
+
+**Question** -- Write a function that takes an integer n as iniput and prints first n lines of Pascal's Triangle
+
+**Example**
+
+```
+input: 5
+output:
+1  
+1 1 
+1 2 1 
+1 3 3 1 
+1 4 6 4 1 
+```
+
+![ques](./ques.png)
+
+## JavaScript Implementation
+
+### [Solution](./JavaScript/pascal_MadhavBahlMD)
+
+```js
+/**
+ * @author MadhavBahlMD
+ * @date 09/01/2018
+ */
+
+function findPascal (row, col) {
+    if (col === 1 || col === row) {
+        return 1;
+    } else {
+        return findPascal (row-1, col-1) + findPascal (row-1, col);
+    }
+}
+
+function printPascal (num) {
+    let currentRow;
+    for (let i=1; i<=num; i++) {
+        currentRow = '';
+        for (let j=1; j<=i; j++) {
+            currentRow += findPascal (i, j) + ' ';
+        }
+        console.log(currentRow);
+    }    
+}
+
+console.log ('/* ===== Pascal\'s Triangle for n = 5\n');
+printPascal (5);
+console.log ('\n/* ===== Pascal\'s Triangle for n = 7\n');
+printPascal (7);
+```