How do you check if a string is a palindrome in Java using array?

How do you check if a string is a palindrome using an array?

Program to check if an Array is Palindrome or not

  1. Initialise flag to unset int flag = 0.
  2. Loop the array till size n/2.
  3. In a loop check if arr[i]! = arr[n-i-1] then set the flag = 1 and break.
  4. After the loop has ended, If flag is set the print “Not Palindrome” else print “Palindrome”

What is palindromic array?

Palindrome means same when read from both ends. This term may be applied to String, numbers and arrays. When applied to String and numbers, it means the original String and number are the same when reversed. Examples are “wow”, 13631 etc. … Example of a Palindrome array is [12, 32, 67, 32, 12].

How do you check if a word is a palindrome in Java?

1. Algorithm

  1. Pick first character and last character of string and compare. If both matches – continue. Else string is not palindrome.
  2. Pick second character from start and last, compare both. If both matches – continue. …
  3. Continue above comparisons till both characters to compare are same or consecutive to each other.
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Is palindrome string program in Java?

This is a Java Program to Check whether a String is a Palindrome. Enter any string as input. Now we use for loops and if-else conditions along with equalsIgnoreCase() method to conclude whether the entered string is palindrome or not.

How do you identify a palindrome?

Palindrome number algorithm

  1. Get the number to check for palindrome.
  2. Hold the number in temporary variable.
  3. Reverse the number.
  4. Compare the temporary number with reversed number.
  5. If both numbers are same, print “palindrome number”
  6. Else print “not palindrome number”

How do you check if a word is a palindrome in C?

To check if a string is a palindrome or not, a string needs to be compared with the reverse of itself. To compare it with the reverse of itself, the following logic is used: 0th character in the char array, string1 is same as 4th character in the same string. 1st character is same as 3rd character.

How do you make an array of palindromes in Java?

To make any array a palindrome, we can simply apply merge operation n-1 times where n is the size of the array (because a single-element array is always palindromic, similar to single-character string). In that case, the size of array will be reduced to 1.

Is palindrome a string?

A string is said to be palindrome if it reads the same backward as forward. For e.g. above string is a palindrome because if we try to read it from backward, it is same as forward. One of the approach to check this is iterate through the string till middle of string and compare a character from back and forth.

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How do you find a palindrome in a string?

Here are the steps:

  1. Declare a function that accepts one argument, a string.
  2. Save the string length to a variable.
  3. Check if there are more letters left, if so, proceed and otherwise, you have a palindrome.

How do you check if a string is a palindrome in Java using recursion?


  1. Start.
  2. Declare a string variable.
  3. Ask the user to initialize the string.
  4. Call a function to check whether the string is palindrome or not.
  5. If a string is empty, then it is a palindrome.
  6. If the string is not empty, then call a recursive function.
  7. If there is only one character, then it is a palindrome.

How do you check if a sentence is a palindrome?

To find if a sentence is palindrome, compare each character from left and right. If they are equal, compare until left and right of string are equal or right becomes less than left. Remember to ignore white spaces and other characters in a string.

How do you check if a string equals another string Java?

You can check the equality of two Strings in Java using the equals() method. This method compares this string to the specified object. The result is true if and only if the argument is not null and is a String object that represents the same sequence of characters as this object.

Is palindrome possible by rearranging the digits in Java?

We will store the occurrences of every digit that is occurring in the number. Now, we count the number of digits that are occurring odd number of times. If the count is 0 or 1 then we can form a palindrome by rearranging the digits of given number. Otherwise, we cannot make palindrome of given number.

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How do you reverse a string and check if its a palindrome?

The easiest way to find if a given String is Palindrome or not is by writing a recursive function to reverse the String first and then comparing the given String with the reversed String, if both are equal then the given String is a palindrome.

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