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How to Iterate over String

Azad Kshitij
Engineering student at IITJ
・1 min read

If you are just getting started with competitive programming you will definitely come across problem where you have to iterate over a string.

Questions to try

  1. https://leetcode.com/problems/check-if-word-equals-summation-of-two-words/
  2. https://leetcode.com/problems/defanging-an-ip-address/
  3. https://leetcode.com/problems/split-a-string-in-balanced-strings/

I have the answer in different programming languages.

C++

#include <iostream>
#include <string>

int main ()
{
  std::string str ("dev.to");
  for (unsigned i=0; i<str.length(); ++i)
  {
    std::cout << str.at(i);
  }
  return 0;
}
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output: dev.to

Python

Iterating over string is as simple as iterating over a list in python.

string  = "dev.to"
for i in string:
    print(i)
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output: 
d
e
v
.
t
o
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C

#include <stdio.h>
#include <string.h>

int main(void){
    char source[] = "dev.to";
    for (int i = 0; i < strlen(source); i++) {
        printf("%c",source[i]);
    }
}
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output: dev.to

IMPORTANT: This are not the only ways to get your job done but are easy to understand for beginner.

You can search google for answer or just save this post. More to come in future with this series.

Suggest me if you have anything to say because this is my first post on dev.to.

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