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Addition of Consecutive Numbers in Java Program – This specific article talks about the code to find Find consecutive numbers in an array java using Java language.
- The problem here is to find the sum of a set of consecutive numbers or more specifically the sum of all the numbers from 0 to a user-specified integer.
- Our constraint here is the ability to only add positive integers to find the sum of consecutive numbers.
- The input here is a user-defined positive integer.
- The output is the sum of all the numbers from 0 to the input integer.
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import java.util.Scanner; class ConsecutiveAdd { public static void main(String arg[]) { int n; Scanner sc=new Scanner(System.in); System.out.println("Enter a number :"); n=sc.nextInt(); System.out.println("Add Up To("+n+") ----->"+addUpTo(n)); } static int addUpTo(int n) { int sum=0; for(int i=1;i<=n;i++) { sum=sum+i; } return sum; } } |
Output -1:
- Solution:
- In the main method, int n is declared for how to count consecutive numbers in java. After that, a new Scanner class object is initialized and a reference variable sc is set to represent the object.
- This class is used to take user input in Java. Scanner class is part of the java.util package and hence the import statement, in the beginning, is stated to import the functionality of the specified class.
- The next line prints a statement to the console instructing the user to enter a number.
- The .nextInt() method is called by the Scanner object sc. This method reads an int value input by a user and stores it to the int variable n.
- Within the print statement in the last line, the method addUpTo is called and n is passed in as the argument.
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static int addUpTo(int n) { int sum=0; for(int i=1;i<=n;i++) { sum=sum+i; } return sum; } |
- In this method, a variable sum of type int is initialized to the value 0. This variable will store the value of the sum of the consecutive numbers till n.
- In the next line, the for loop iterates n+1 times (since i<=n) and adds i to the current value of the variable sum.
- After the loop is implemented, the sum of all numbers till n is calculated and returned which is then printed out to the console.
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Enter a number : 5 Add Up To(5) ----->15 |
- In this case, the value of n is 5. As the loop in the method addUpTo iterates, the value of i for each iteration gets added.
- From the first iteration to the 6th iteration : 0+1+2+3+4+5 = 15
Output – 2:
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Enter a number : 100 Add Up To(100) ----->5050 |
- In this case, the value of n is 100. As the loop in the method addUpTo iterates, the value of i for each iteration gets added.
- From the first iteration to the 101st iteration : 0+1+2+3+4+ … + 100 = 5050
