Recursion Programming Exercise: Count Characters

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For function "countChr", write the missing part of the recursive call. This function should return the number of times that the letter "A" appears in string "str".
int countChr(String str) { if (str.length() == 0) { return 0; } int count = 0; if (str.substring(0, 1).equals("A")) { count = 1; } return count + <<Missing a Recursive call>> }

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if (guess[0] != initEditor) { console.log(guess[0]); window.codeValue = guess[0]; window.progexType = "RecurTutor"; window.summexName = "RecCCountChrPROG"; } else { return ""; }

The string passed in the recursive call should be less by one character everytime the recursive call is executed.