C Programming Basics Problems for Beginners
1. Generating a series of numbers and calculating their sum in V
Generating like 9 99 999 9999 99999 and there sum
#include <stdio.h>
void main()
{ long int n,i,t=9;
int sum =0;
printf("Input the number or terms :");
scanf("%d",&n);
for (i=1;i<=n;i++)
{
t=t*10+9;
sum =sum+t;
printf("%d ",t);
}
printf("\nThe sum of the series = %d \n",sum);
}
output :
2.The Sum of Odd Natural Numbers in C
#include<stdio.h>
void main ()
{
int i,n,odd=0,sum=0;
scanf("%d",&n);
for(i=1;i<=n;i++){
if(i%2!=0){
printf (" %d",i);
sum=i+sum;
}
}
printf("\nThe odd numbers are :%d\n",n/2+1);
printf("The Sum of odd Natural Number upto 10 terms : %d\n",sum);
}
For example, if the user enters 5, the output could be:
Output:
1 3 5
The odd numbers are: 3
The sum of the first 5 odd natural numbers is 9
3.Prime number Checking in C
#include<stdio.h>
void main ()
{
int i,n,f=0,count=1;
printf("Enter a number:");
scanf("%d",&n);
for(n=1;i<=100;n++){
for(i=2;i<n;i++){
if(n%i==0){
f++;
break;
}
}
}
if(f==0)
{printf("prime number ");}
else
{ printf("prime not number ");}
}
Input:
Enter a number: 5
Output:
prime not number
4.The Sum of Square Natural Number upto 5 terms in C
#include<stdio.h>
void main ()
{
int i, n,square=1,sum=0;
scanf("%d",&n);
printf("The square natural upto 5 terms are :");
for(i=1;i<=n;i++){
square=i*i;
printf("%d ",square);
sum=square+sum;
}
printf("\nThe Sum of Square Natural Number upto 5 terms:%d",sum);
}
Input: 5
Output:
The square natural upto 5 terms are :1 4 9 16 25
The Sum of Square Natural Number upto 5 terms:55
5.The sum of the digits of the Given Number in C
#include<stdio.h>
void main ()
{
int r,n,sum=0;
printf("Enter any number:");
scanf("%d",&n);
while(n>0){
r=n%10;
sum=sum+r;
n=n/10;
}
printf("Sum of the digits of Given Number = %d",sum);
}
Input: Enter any number:567
Output: Sum of the digits of the Given Number = 18
6. Area of Sphere surface in C
#include<stdio.h>
int main()
{
double radius,area;
const double pie =3.1416;
printf("Enter a radius :");
scanf("%lf",&radius);
area =4*3.1416*radius*radius;
printf("Sphere surface is:%.3lf",area);
return 0;
}
Input: Enter a radius: 8
Output: Sphere surface is:804.250