Program for Reverse Characters String

Reverse Characters String

We will write a C program to print reverse characters string and the number will be entered by the user. This will help to understand the basic structure of programming. In this program , we will print the reverse characters string easily by using proper syntax and algorithms.

Program for Sum of Prime Numbers

Working of Program :

In the program, we will require some numbers from the user to print the reverse characters of string.

Important Note :

  • String is a sequence of characters terminated with a null character.
  • Reversing of string is a method that reverse the order of given string.


In the following program we will display the reverse of string using while() loop.

Syntax for while() Loop:-

    // Statements
    // Increment / Decrement

Problem 2

Write a program to the reverse of given string using while() loop.

  • Firstly, we have to enter the number.
  • Then print the reverse of string.


int main ()
  char str1[50], temp;
  int i = 0, j = 0;
  printf (" Enter a string to be reversed = ");
  scanf ("%s", str1);
  j = strlen (str1) - 1;
  while (i < j)
      temp = str1[j];
      str1[j] = str1[i];
      str1[i] = temp;
  printf (" The reversed of the string = %s", str1);
  return 0;


Enter a string to be reversed = PrepInsta
The reversed of the string = atsnIperP

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