Given a string name, we have to find the initials of the name
Examples:
Input : prabhat kumar singh Output : P K S We take the first letter of all words and print in capital letter. Input : Jude Law Output : J L Input : abhishek kumar singh Output : A K S
- Print first character in capital.
- Traverse rest of the string and print every character after space in capital letter.
Implementation:
C++
// C++ program to print initials of a name#include <bits/stdc++.h>using namespace std;void printInitials(const string& name){ if (name.length() == 0) return; // Since toupper() returns int, we do typecasting cout << (char)toupper(name[0]); // Traverse rest of the string and print the // characters after spaces. for (int i = 1; i < name.length() - 1; i++) if (name[i] == ' ') cout << " " << (char)toupper(name[i + 1]);}// Driver codeint main(){ string name = "prabhat kumar singh"; printInitials(name); return 0;} |
Java
// Java program to print initials of a nameimport java.io.*;class initials { static void printInitials(String name) { if (name.length() == 0) return; // Since toupper() returns int, // we do typecasting System.out.print(Character.toUpperCase( name.charAt(0))); // Traverse rest of the string and // print the characters after spaces. for (int i = 1; i < name.length() - 1; i++) if (name.charAt(i) == ' ') System.out.print(" " + Character.toUpperCase( name.charAt(i + 1))); } // Driver code public static void main(String args[]) { String name = "prabhat kumar singh"; printInitials(name); }}// This code is contributed by Danish Kaleem |
Python
# Python program to print # initials of a name# user define function def printInitials(name): if(len(name) == 0): return print(name[0].upper()), for i in range(1, len(name) - 1): if (name[i] == ' '): print (name[i + 1].upper()),def main(): name = "Prabhat Kumar Singh" printInitials(name)if __name__=="__main__": main() # This code is contributed# by prabhat kumar singh |
C#
// C# program to print initials of a nameusing System;class initials { static void printInitials(String name) { if (name.Length == 0) return; // Since toupper() returns int, // we do typecasting Console.Write(Char.ToUpper(name[0])); // Traverse rest of the string and // print the characters after spaces. for (int i = 1; i < name.Length - 1; i++) if (name[i] == ' ') Console.Write(" " + Char.ToUpper(name[i + 1])); } // Driver code public static void Main() { String name = "prabhat kumar singh"; printInitials(name); }}// This code is contributed by nitin mittal. |
PHP
<?php// php program to print initials of a namefunction printInitials($name){ if (strlen($name) == 0) return; // Since toupper() returns int, we do typecasting echo strtoupper($name[0]); // Traverse rest of the string and print the // characters after spaces. for ($i = 1; $i < strlen($name) - 1; $i++) if ($name[$i] == ' ') echo " " . strtoupper($name[$i + 1]);}// Driver code$name = "prabhat kumar singh";printInitials($name);// This code is contributed by Sam007?> |
Javascript
<script> // Javascript program to print initials of a name function printInitials(name) { if (name.length == 0) return; // Since toupper() returns int, // we do typecasting document.write(name[0].toUpperCase()); // Traverse rest of the string and // print the characters after spaces. for (let i = 1; i < name.length - 1; i++) if (name[i] == ' ') document.write(" " + name[i + 1].toUpperCase()); } let name = "prabhat kumar singh"; printInitials(name); </script> |
Output
P K S
Time Complexity: O(n), Here n is the length of the string.
Auxiliary Space: O(1), As constant extra space is used.
Another possible solution is given as follows:
C++
// C++ program to solve the above approach#include <bits/stdc++.h>using namespace std;void printInitials(string name){ if (name.length() == 0) return; // split the string using 'space' // and print the first character of every word stringstream X(name); // X is an object of stringstream // that references the S string // use while loop to check the getline() function // condition while (getline(X, name, ' ')) { /* X represents to read the string from stringstream, T use for store the token string and, ' ' whitespace represents to split the string where whitespace is found. */ cout << (char)toupper(name[0])<<" "; // print split string }}// Driver codeint main(){ string name = "prabhat kumar singh"; printInitials(name); return 0;}// This code is contributed by gauravrajput1 |
Java
// Java program to print initials of a nameimport java.io.*;class initials { static void printInitials(String name) { if (name.length() == 0) return; //split the string using 'space' //and print the first character of every word String words[] = name.split(" "); for(String word : words) { System.out.print(Character.toUpperCase(word.charAt(0)) + " "); } } // Driver code public static void main(String args[]) { String name = "prabhat kumar singh"; printInitials(name); }} |
Python3
# Python3 program to print initials of a namedef printInitials(name): if (len(name) == 0): return # Split the string using 'space' # and print the first character of # every word words = name.split(" ") for word in words: print(word[0].upper(), end = " ")# Driver codeif __name__ == '__main__': name = "prabhat kumar singh" printInitials(name)# This code is contributed by mohit kumar 29 |
C#
// C# program to print initials of a nameusing System;public class initials { static void printInitials(String name) { if (name.Length == 0) return; //split the string using 'space' //and print the first character of every word String []words = name.Split(' '); foreach(String word in words) { Console.Write(char.ToUpper(word[0]) + " "); } } // Driver code public static void Main(String []args) { String name = "prabhat kumar singh"; printInitials(name); }}// This code is contributed by gauravrajput1 |
Javascript
<script>// javascript program to print initials of a name function printInitials( name) { if (name.length == 0) return; // split the string using 'space' // and print the first character of every word var words = name.split(" "); words.forEach(myFunction); } function myFunction(item) { document.write((item[0].toUpperCase()) + " ");} // Driver code var name = "prabhat kumar singh"; printInitials(name);// This code is contributed by gauravrajput1</script> |
Output
P K S
The time complexity of this code will be less than O(N) where N is number of words in sentence, which can be little better than number of characters in String.
Space Complexity: O(N), where N is the length of the string. We need to store the entire string in the stringstream object.
This code is contributed by Anuj Khasgiwala
We can also use strtok() function in C/C++ to achieve this.
This article is contributed by Prabhat kumar singh. If you like neveropen and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the neveropen main page and help other Geeks.
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