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C Exercises: Display n natural numbers and their sum

C For Loop: Exercise-3 with Solution

Write a program in C to display n terms of natural number and their sum.

Pictorial Presentation:

Display n natural numbers and their sum

Sample Solution:

C Code:

#include <stdio.h>
void main()
{
   int i,n,sum=0;
   printf("Input Value of terms : ");
   scanf("%d",&n);
   printf("\nThe first %d natural numbers are:\n",n);
   for(i=1;i<=n;i++)
   {
     printf("%d ",i);
     sum+=i;
   }
   printf("\nThe Sum of natural numbers upto %d terms : %d \n",n,sum);

}

Sample Output: 

Input Value of terms : 7                                                                                      
                                                                                                              
The first 7 natural number is :                                                                               
1 2 3 4 5 6 7                                                                                                 
The Sum of Natural Number upto 7 terms : 28

Flowchart:

Flowchart: Display n natural numbers and their sum

C Programming Code Editor:

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Previous: Write a C program to find the sum of first 10 natural numbers.
Next: Write a program in C to read 10 numbers from keyboard and find their sum and average.

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP