C-43 : Sum of 1 to 100 numbers

Refer  Find Sum , Sum of n even numbers using user defined fun... 


1st Method :

#include<stdio.h> #include<conio.h> void main()             {             clrscr();             int i,sum=0;             for(i=1;i<101;i++)                         sum=sum+i;             printf("The sum of the numbers from 1 to %d is %d\n",i-1,sum);             getch();             }

2nd Method :

#include<stdio.h> #include<conio.h> void main()             {             clrscr();             int i,sum=0;             for(i=1;i<101;sum+=i++)             ;             printf("The sum of the numbers from 1 to %d is %d\n",i-1,sum);             getch();             }

3rd Method :

#include<stdio.h> #include<conio.h> void main()             {             clrscr();             int i,sum=0;             for(i=1;i<101 && (sum+=i++);)             ;             printf("The sum of the numbers from 1 to %d is %d\n",i-1,sum);             getch();             }

Output : 


The sum of the numbers from 1 to 100 is 5050
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