Reverse a String
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class Main {
/*
Write a function or program that takes a string as input and returns the string reversed.
input="Hello, World!"
output ="!dlroW ,olleH"
*/
// first convert the str into charArray
// two pointers --> one will be the start poition and other one in the end
//start swapping at the position pointed by the two pointers
// increment the starter pointer and decrement the end pointer
// return the reversed string
public static String reverseString(String str){
char[] charArray = str.toCharArray();
int start = 0;
int end = str.length() - 1;
// while loop swapping
while(start<end){
char temp = charArray[start];
charArray[end] = charArray[start];
charArray[end] = temp;
start++;
end--;
}
return new String(charArray);
}
public static void main(String[] args) {
String input = "Hello, World!";
String isReversed = reverseString(input);
System.out.println(isReversed);
}
}
Java
INFO