Let’s understand some concept.
Natural Number..
All counting number which start from 1, 2, 3, 4, 5, 6, 7, 8, 9…………………. Infinite…
Sum of Natural Number between two range b=n/2*[2*a+(n+1)*d] if you enter number then the sum done by this formula…
- a=first number
- n = number of Natural number
- d= difference between the two number
Some important symbols used in code.
- () small bracket
- && use for ‘and’ use for address
- {} curly bracket
- “” double code
Sum by using the arithmetic progression..
- #include<stdio.h>
- #include<conio.h>
- void main()
- {
- int a, b, c, d, n, e, f, g, h;
- clrscr();
- printf(“Enter Number to find the Sum of Natural number between two range \n Enter two range number”);
- scanf(“%f%f”, &b, &c);
- n=c-b;
- d=1;
- a=b;
- e=n/2;
- f=2*a+(n-1)*d;
- g=e*f;
- printf(“%f”, g);
- getch();
- }
Inputs..
If b=10 and c=20 then
Results..
Sum= 165
Sum by using ‘for’ loop..
If you enter range of Natural Number then using a loop. A after increment natural Number added by this method b+=a which like a++. In loop same rule follow by Increment and adding in on container like all alphabet.
- #include<stdio.h>
- #include<conio.h>
- void main()
- {
- float a, b, c, d=0, e;
- clrscr();
- printf(“Enter two range to find sum of Natural number between range number”);
- scanf(“%f%f”, &a, &b);
- for(c=a;c<=b;c++)
- {
- d+=c;
- }
- printf(“%f”, d);
- getch();
- }
Inputs..
If a=10 and b=20 then
Results..
Sum= 165
Sum by using ‘while’ loop..
- #include<stdio.h>
- #include<conio.h>
- void main()
- {
- float a, b, c, d=0, e;
- clrscr();
- printf(“Enter two range to find sum of Natural number between range number”);
- scanf(“%f%f”, &a, &b);
- while(a<=b)
- {
- c+=a;
- a++;
- }
- printf(“%f”, c);
- getch();
- }
Inputs..
If a=10 and b=20 then
Results..
Sum= 165
Sum by using ‘do while’ loop..
- #include<stdio.h>
- #include<conio.h>
- void main()
- {
- float a, b, c, d=0, e;
- clrscr();
- printf(“Enter two range to find sum of Natural number between range number”);
- scanf(“%f%f”, &a, &b);
- do
- {
- c+=a;
- a++;
- }
- while(a<=b);
- printf(“%f”, c);
- getch();
- }
Inputs..
If a=10 and b=20 then
Results..
Sum= 165
Today world 