C program to Calculate (1) + (1+2) + (1+2+3) + (1+2+3+4) + ... + (1+2+3+4+...+n) series

Series Program

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• Basic C programming exercises
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• Star patterns exercises
• Number pattern exercises
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• Pointer exercises
• Files handling exercises

Program to Print Number Series in C

In c language you can print any number series. Here i will show you how to print number series in c language with explanation. In case of print number series you need to focus on common difference between two numbers..

C program to Calculate (1) + (1+2) + (1+2+3) + (1+2+3+4) + ... + (1+2+3+4+...+n) series

#include<stdio.h>
int main()
{
    int i,j,n,sum=0;
    n=10;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=i;j++)
        {
            sum+=j;
        }
    }
    printf("Sum: %d",sum);
    return 0;
}

Output:

sum: 220

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,j,n,sum=0;
    printf("\n Enter n value(1) + (1+2) + (1+2+3) + (1+2+3+4) + ... + (1+2+3+4+...+n):");
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=i;j++)
        {
            sum+=j;
        }
    }
    printf("Sum: %d",sum);
    return 0;
}

Output:

 Enter n value(1) + (1+2) + (1+2+3) + (1+2+3+4) + ... + (1+2+3+4+...+n):31
Sum: 5456
Process returned 0 (0x0)   execution time : 2.316 s

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