my find

Author: Ogbemi mene

Sprint-3/4-stretch/find.js

@@ -20,6 +20,26 @@ console.log(find("code your future", "z"));
 // Pay particular attention to the following:
 
 // a) How the index variable updates during the call to find
+// The index variable starts at 0. In every iteration of the while loop, 
+// after the if check is performed, index increases by exactly 1 (index++). 
+//  This moves the "pointer" one character to the right through the string str, 
+// ensuring that the function checks every character sequentially from left to right.
+
 // b) What is the if statement used to check
+// The if statement checks equality. Specifically, it asks: 
+// "Does the character currently stored at the index position of the string match the char I am looking for?"
+// If the answer is true, the function immediately returns the current index, which exits the entire function.
+// If the answer is false, the loop simply continues to the next iteration.
+
 // c) Why is index++ being used?
+// index++ (which is shorthand for index = index + 1) is the loop advancement mechanism. 
+// Without it, index would remain 0 forever. 
+// This would cause an "infinite loop" where the program keeps checking the very first character of the string over and over again, 
+// never moving forward to inspect the rest of the string.
+
 // d) What is the condition index < str.length used for?
+// This is the boundary condition (or loop guard). It ensures the code doesn't try to look for a character outside of the string's memory.
+// In JavaScript, if you try to access an index that doesn't exist, it returns undefined.
+// By ensuring index is always less than the length of the string, we guarantee that we only access valid positions. 
+// Once index equals the length of the string, it means we have checked every single character without finding a match, 
+// so the loop terminates, and the function returns -1 (indicating "not found").