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.
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