Java From the following isPal method, how many times is the isPal method invoked for isPal("aabaa")?
Java
From the following isPal method, how many times is the isPal method invoked for isPal("aabaa")?
The isPal method is a recursive function that checks if a given string is a palindrome or not. To count the number of times the isPal method is invoked for the string "aabaa," we need to follow each call to the method.
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The first call to the isPal method is for the string "aabaa." The length of this string is greater than 1, so the second if statement is executed.
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The first and last characters of the string are compared: a != a. The characters are equal, so the function returns true.
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The next call to the isPal method is for the substring "aba." The length of this string is still greater than 1, so the second if statement is executed.
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The first and last characters of the string are compared: a != a. The characters are equal, so the function returns true.
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The final call to the isPal method is for the substring "b." The length of this string is 1 or less, so the first if statement is executed and the function returns true.
In total, the isPal method was invoked three times for the string "aabaa."
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