How To Reverse a String In C?

 

In this article, we will learn how to reverse a string in C. Also, we will enhance your knowledge on the permutation of strings which contain the same characters. 

Using the strrev() function.

The strrev() function is used to reverse a string in C and returns the result. This can be useful when you want to reverse an array of characters or if you want to reverse the contents of an array variable.

To use this function, call it with your string as a parameter and then pass in an empty array as the second parameter, and hence, the return value will be your reversed text!

Here is an example of how to use it:

$array = array(‘ABC’, ‘DEF’); $reversed = rrev($array); print_r($reversed);

Without using the library function.

To reverse a string, you can use the strcpy() function. This function copies the string from the second argument (the one you want to reverse a string in C) to the first argument.

The second argument should be a pointer that points at your original string as it sits in memory; this will tell us where we are copying data from and where we are copying it into! We call this pointer our destination because we are going to be moving stuff around using it—it is our destination point!

Let us look at an example:

“`cstr = “Hello World”; cstrr = strlen(cstr); //for looping through every character in our string for(int i=0; i<=cstrr; ++i){ printf(“%s”, cstr[i]); } “`

Using the recursion function.

Recursion is a function that calls itself. It is a good way to solve problems that involve repetition, like reversing a string. This can be done by using the recursion function in C, which reverses an array of characters by calling itself again on its own substring.

For example:

“`c

“`int reverseString(char *str) { int n = strlen(str); char *subStr = malloc(n+1); subStr[0] = ‘\0’; for (int i = 1; i 0) && !(*subTrimmedString()===*subString)) return 0; else return 1;} return 0;}“`

Reversing a string using ‘for loop’.

You can use for loop to reverse a string in C. To understand what this means, let us take a look at it in detail:

• For loop is a control structure that uses two parts: initialization and termination. Before beginning execution of the program, the initialization part of a for statement defines variables that will be used within the body of your code (the loop). After initialization ends, then you can execute your code block repeatedly until there are no more elements in your list or range anymore.
• In short: You need to create an array with all possible character values before starting execution of your program so as to have all characters available during each iteration through this array.Otherwise, you would run out sooner than expected due to lack thereof being able to iterate over each value individually without having any additional memory allocated beforehand! This leads us back into needing some storage space available first before proceeding onward with our next step towards completion here today.

Reversing a string using ‘while loop’.

While loop is used to execute a block of code repeatedly until a certain condition becomes false. The condition is checked before the body of the loop is executed, and then it is checked again after that body has been executed. The loop stops when the condition becomes false, which means that you can use this construct to reverse a string without worrying about an infinite loop occurring if you do not increment i after each iteration in your while loop (which would be bad).

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