Counting letters in a string using two for-loops

Question

I have to read the string \"hello world\" and output each letter\'s frequency using only for loops. The instructor hinted that I\'d need to use two loops and ga

Answer 1

On the second for loop, just go through each character of string and compare it with the current character of first for loop.

(not the solution I would do, just following your instructors hint)

Another way is to store values within a map with the chars as key and a counter of occurrences as value.

HashMap map = new HashMap<>();

for (int ii=0; ii

UPDATE:

//iterating on the map to output values:
for (char key : map.keySet()) {
   System.out.println(key+": "+map.get(key));
}