Program to count white space of the given string in Java

Program to count white space of the given string

In this article, we will discuss the concept of the Program to count the white spaces of the given string in Java

In this post, we are going to learn how to count the number of white space in the given string in Java programming language

Program to count white space of the given string in Java — Count white space of the given string

Code to find the white space in the string

count the space in the given string using for loop

The program allows the user to enter a String and then it counts the white space in the given string using for loop in Java programing language

Program 1

//program to count te space of the given string
import java.util.Scanner;
public class Count_space{
public static void main(String args[]){
//variable declaration 
    String str;
int space=0;
//vriable declaration and initialization
 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the String  ");
str=scan.nextLine();

for(int i=0; i<=str.length(); i++){
char ch=str.charAt(i);
 if(ch==' '){
        space++;
    }
}

System.out.println("Total white space : "+space);
}
}

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

Enter the string
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Total white space: 6

count the space in the given string using while loop

The program allows the user to enter a String and then it counts the white space in the given string using while loop in Java programing language

Program 2

//program to count te space of the given string
import java.util.Scanner;
public class Count_space1{
public static void main(String args[]){
//variable declaration 
    String str;
int space=0;
//vriable declaration and initialization
 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the String  ");
str=scan.nextLine();

int i=0; 
while(i<str.length()){
char ch=str.charAt(i);
 if(ch==' '){
        space++;
    }
     i++;
}

System.out.println("Total white space : "+space);
}
}

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

Enter the string
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Total white space: 4

count the space in the given string using do-while loop

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

Program 3

//program to count te space of the given string
import java.util.Scanner;
public class Count_space2{
public static void main(String args[]){
//variable declaration 
    String str;
int space=0;
//vriable declaration and initialization
 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the String  ");
str=scan.nextLine();

int i=0; 
do{
char ch=str.charAt(i);
 if(ch==' '){
        space++;
    }
     i++;
}while(i<str.length());

System.out.println("Total white space : "+space);
}
}

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

Enter the string
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Total white space: 2

Approaches

Declare a String variable as String str;
Declare and initialize integer variables as space=0;
The user asked to enter a string
The given string is stored in the variable str;
A loop(for, while and do-while) is used to count space in the given string.
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(ch==’ ‘, when the if statements is true, The space becomes space + 1( space = space +1);
When it is false, terminates the loop
Finally, the program displays the total number of space of the given string