Java program: count the total number of characters including space in the given string

Karmehavannan

5 years ago

Java program to count the total number of characters including space in the given string

In this article, we will discuss the concept of the Java program to count the total number of characters including space in the given string

In this post, we are going to learn how to count the total number of character including space of the given String in Java programming language

Java program:count the total number of characters including space in the given string — Count character

Java program to count to the total number of characters in the given string

Code to count the total number of characters in the given string using for loop

The program allows the user to enter a String and then it counts and display the total number of characters including space of the given string using for loop in Java programing language

Program 1

import java.util.Scanner;
public class Count_WordOfString{
public static void main(String args[]){
String str; //variable declaration
int count=0;

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.print("Enter the String for count characters \n ");
str=scan.nextLine();

//count each character without space
for(int i=0; i<str.length(); i++){
    if(str.charAt(i)!='\0'){
        count++;
    }
}
//display the total number of characters in te given string
System.out.print("Total number of character in a string: "+count);
}
}

When the above code is executed, it produces the following result

Enter the String for count characters
Java Language
Total number of character in a string:13

Approach

Declare a String variable as String str;
Declare and initialize an integer variable as int count=0;
The user asked to enter a string to count character
The entered string is stored in the str variable
A for-loop is used to count total characters of the given string using the count variable
It is initialized as i=0, checks the condition whether i<str.length(); and executes the loop until the given condition becomes true
Use an if condition to test if(str.charAt(i)!=’ \0′), if it is true, count becomes count + 1(count=count+1)
Finally, the program displays the total number of the character using the count variable

Code to count the total number of characters in the given string using while loop

The program allows the user to enter a String and then it counts and display the total number of characters including space of the given string using while loop in Java programing language

Program 2

import java.util.Scanner;
public class Count_WordOfString1{
public static void main(String args[]){
String str; //variable declaration
int count=0;

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the String for count characters  ");
str=scan.nextLine();

//count each character without space
int i=0;
while(i<str.length()){
    if(str.charAt(i)!='\0'){
        count++;
    }
     i++;
}
//display the total number of characters in te given string
System.out.print("Total number of character in a string:"+count);
}
}

When the above code is executed, it produces the following result

Enter the String for count characters
Java Program
Total number of character in a string:12

Approach

Declare a String variable as String str;
Declare and initialize an integer variable as int count=0;
The user asked to enter a string to count character
The entered string is stored in the str variable
A while-loop is used to count total characters of the given string using the count variable
It is initialized as i=0, checks the condition whether i<str.length(); and executes the loop until the given condition becomes true
Use an if condition to test if(str.charAt(i)!=’ \0′), if it is true, count becomes count + 1(count=count+1)
Finally, the program displays the total number of the character using the count variable

Code to count the total number of characters in the given string using do-while loop

The program allows the user to enter a String and then it counts and display the number of characters including space of the given string using do-while loop in Java programing language

Program 3

import java.util.Scanner;
public class Count_WordOfString2{
public static void main(String args[]){
String str; //variable declaration
int count=0;

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the String for count characters  ");
str=scan.nextLine();

//count each character without space
int i=0;
do{
    if(str.charAt(i)!='\0'){
        count++;
    }
     i++;
}while(i<str.length());
//display the total number of characters in te given string
System.out.print("Total number of character in a string:"+count);
}
}

When the above code is executed, it produces the following result

Enter the String for count characters
Java OOP Language
Total number of character in a string:17

Approach

Declare a String variable as String str;
Declare and initialize an integer variable as int count=0;
The user asked to enter a string to count character
The given string is stored in the variable str;
A do-while-loop is used to count total characters of the given string using the count variable
It is initialized as i=0, checks the condition whether i<str.length(); and executes the loop until the given condition becomes true
Use an if condition to test if(str.charAt(i)!=’ \0′), if it is true, count becomes count + 1(count=count+1)
Finally, the program displays the total number of the character using the count variable