C Programming Code Examples C > Pyramid Patterns Code Examples program to Calculate 1 + 2 + 3 + 4 + 5 + ... + n series program to Calculate 1 + 2 + 3 + 4 + 5 + ... + n series 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.. #include<iostream.h> #include<conio.h> void main() { int j,n,sum=0; clrscr(); n=10; for(j=1;j<=n;j++) { sum+=j; } cout<<"Sum: "<<sum; getch(); }