List all the Prime Numbers

#include<stdio.h>
void main()
{
 int n,i,j,flag; 
 printf("\n\nEnter the limit\t:"); 
 scanf("%d",&n);
 printf("\nThe prime numbers within the given limit:\n");
 for(i=1;i<=n;i++)
  { 
  flag=0;
  for(j=2;j<=i/2;j++)
   { 
   if(i%j==0) 
    { 
    flag=1;
    break;
    }
   }
  if(flag==0)
   printf("%d\t",i);
  }
}

   

Output
Enter the limit :60

The prime numbers within the given limit:
1       2       3       5       7       11      13      17      19      23
29      31      37      41      43      47      53      59

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Solve Quadratic Equation

#include <stdio.h>
#include <math.h>
void main() 
{
 float a,b,c,d,temp,r1,r2; 
 printf("\nEnter the value of a\t:");
 scanf("%f",&a); 
 printf("Enter the value of b\t:");
 scanf("%f",&b);
 printf("Enter the value of c\t:");
 scanf("%f",&c);

 d=((b*b)-(4*c*a));
 
 if(d==0)
 {
  printf("\nRoots are real and equal\n");
  r1=-b/(2*a);
  printf("\t X1=%f \n \t X2=%f ", r1, r1 );
 }

  else if(d>0)
 {
  printf("\nRoots are real and distinct\n");
  temp=sqrt(d);

  r1=(-b+temp)/(2*a);
  r2=(-b-temp)/(2*a);

  printf("\n\tX1=%f\n\tX2=%f",r1,r2);
 }

  else
 {
  printf("\nRoots are Imaginary\n");
  d*=-1;
  temp=sqrt(d);
  r1=-b/(2*a);
  r2=temp/(2*a);
  printf("\n\tX1=(%f + %fi)\n\tX2=(%f - %fi)",r1,r2,r1,r2);
 }
}

  

Output
Enter the value of a    :1
Enter the value of b    :-11
Enter the value of c    :30

Roots are real and distinct

        X1=6.000000
        X2=5.000000

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Find the greatest of two numbers using Conditional Operator

#include<stdio.h>
void main()
{
 int n1,n2,g;
 printf("Enter Numbers (n1, n2) : ");
 scanf("%d %d",&n1,&n2);
 g=n1>n2?n1:n2;
 printf("Greatest=%d",g);
}

  

Output
Enter Numbers (n1, n2) : 5 6 

Greatest=6

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Generate the Fibonacci Series

#include<stdio.h>

void main() 
{
 int t,i,m=0,n=1,f=1; 
 printf("\n\nEnter the number of terms:");
 scanf("%d",&t); 
 printf("\n The Fibonacci Series of %d terms:\n",t);
 for(i=1;i<=t;i++)
  {
   printf("%d\t",f);
   f=m+n;
   m=n;
   n=f;
  }
}

  

Output
Enter the number of terms:10

 The Fibonacci Series of 10 terms:
1       1       2       3       5       8       13      21      34      55

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Print 1-10 using do-while loop

#include<stdio.h>
void main()
{
    int i=1;
    do{
        printf("%d\n",i);
        i++;
      }while(i=100);
}

  

Output

1
2
3
4
5
6
7
8
9
10

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Find the perimeter of a Circle

#include <stdio.h>

void main()
{
    int r;
    float pi=3.14;
    r=7;
    printf("Perimeter=%f",2*pi*r);
}

  

Output
Perimeter=43.960003

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Check whether an alphabet is Vowel or not

#include <stdio.h>

void main()
 {
  char in;
  printf("Enter Character: ");
  scanf("%c", &in);
  if(in>=65&&in<=90 || in>=97&& in<=122)
  {
   if(in<97)
   in=in+32;
   if(in=='a'||in=='e'||in=='i'||in=='o'||in=='u')
   printf("vowel");
   else
         printf("consonent");
  }
  else
   printf("Not an valid Alphabet");
 }

  

Output
Enter Character: A 
vowel

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Print the ASCII values of all the English Alphabets

#include<stdio.h>
void main()
{
 char chl='a';
 char chu='A';
 int i;
 printf("\n===========================");
 for(i=1;i<=26;i++,chu++,chl++)
    printf("\n|%c |  %d \t|| %c| %d  |",chl,chl, chu, chu);   
 printf("\n===========================");
}

  

Output
===========================
|a |  97        || A| 65  |
|b |  98        || B| 66  |
|c |  99        || C| 67  |
|d |  100       || D| 68  |
|e |  101       || E| 69  |
|f |  102       || F| 70  |
|g |  103       || G| 71  |
|h |  104       || H| 72  |
|i |  105       || I| 73  |
|j |  106       || J| 74  |
|k |  107       || K| 75  |
|l |  108       || L| 76  |
|m |  109       || M| 77  |
|n |  110       || N| 78  |
|o |  111       || O| 79  |
|p |  112       || P| 80  |
|q |  113       || Q| 81  |
|r |  114       || R| 82  |
|s |  115       || S| 83  |
|t |  116       || T| 84  |
|u |  117       || U| 85  |
|v |  118       || V| 86  |
|w |  119       || W| 87  |
|x |  120       || X| 88  |
|y |  121       || Y| 89  |
|z |  122       || Z| 90  |
===========================

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Find Area and Circumference of a Circle

#include<stdio.h>
#define PI 3.142 

void main() 
{
 float r,a,c;
 printf("\nEnter the radius of circle:\t");
 scanf("%f",&r);
 a=PI*r*r; 
 printf("\nThe area of the circle:\t%f",a);
 c=2*PI*r; 
 printf("\nThe circumference of the circle: %f",c);
}

  

Output
Enter the radius of circle: 2
The area of the circle: 12.568000
The circumference of the circle: 12.568000
Enter the radius of circle: 1
The area of the circle: 3.142000
The circumference of the circle: 6.284000

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Print the Truth Table

#include<stdio.h>

int OR(int,int);
int AND(int,int);
int XOR(int,int);
int NOT(int);

void main()
{
 int a,b,ch,o;

 printf("\n-:MENU:-\n1.AND\n2.OR\n3.NOT\n4.XOR\n0.Exit\n");
 do{
    printf("\nEnter Choice:");
    scanf("%d",&ch);

    switch(ch)
     {
      case 1:
             printf ("\nTruth Table for AND\nA B  \tO");
             for(a=0;a<=1;a++)
             {
              for(b=0;b<=1;b++)
                { 
                  o=AND(a,b);
                  printf("\n%d %d \t%d",a,b,o);
                }
             }
              break;
      case 2:
             printf ("\nTruth Table for OR\nA B  \tO");
             for(a=0;a<=1;a++)
             {
              for(b=0;b<=1;b++)
                {
                o=OR(a,b);
                printf("\n%d %d \t%d",a,b,o);
                }
             }
              break;
      case 3: 
             printf ("\nTruth Table for NOT\nA  \tO");
             for(a=0;a<=1;a++)
             {
             o=NOT(a);
             printf("\n%d  \t%d",a,o);
             }
              break;
      case 4:
             printf ("\nTruth Table for XOR\nA B  \tO");
             for(a=0;a<=1;a++)
             {
              for(b=0;b<=1;b++)
                {
                o=XOR(a,b);
                printf("\n%d %d \t%d",a,b,o);
                }
             }
              break;

      case 0: exit();
              break;
             default: printf("\nError");
             }
      }while(ch!=0);

}


int OR(int a, int b)
{
if(a==0&&b==0)
   return 0;
else
   return 1;
}

int AND(int a, int b)
{
if (a==1&&b==1)
   return 1;
else
   return 0;
}

int NOT(int a)
{
if (a==0)
   return 1;
else
   return 0;
}

int XOR(int a,int b)
{
if (a==0&&b==1||a==1&&b==0)
   return 1;
else
   return 0;
}

  

Output
-:MENU:-
1.AND
2.OR
3.NOT
4.XOR
0.Exit
Enter Choice: 3 
Truth Table for NOT
A   O
1   0
0   1

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Simple Interest

#include<stdio.h>
void main()
{
 float p;
 float ir,t;
 float in;

  printf("Principle amount : ");
  scanf("%f",&p);
  printf("\nInterest : ");
  scanf("%f",&ir);
  printf("\nTime (in year) : ");
  scanf("%f",&t);
  in=p*ir*t/100;
  printf("\nYou will get interest : Rs. %.2f",in);

}

  

Output
Principle amount : 5000
Interest : 10
Time (in year) : 3
You will get interest :Rs. 1500.00

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Print the Multiplication Table

#include<stdio.h>

void main()
{
 int x=1,num,res;
 printf("Enter a Number : ");
 scanf("%d",&num);
 while(x<=10)
 {
   res=num*x;
   printf("\n%d x %d = %d",num,x,res);
   x++;
 } 
}

  

Output
Enter a Number : 6
6 x 1 = 6
6 x 2 = 12
6 x 3 = 18
6 x 4 = 24
6 x 5 = 30
6 x 6 = 36
6 x 7 = 42
6 x 8 = 48
6 x 9 = 54
6 x 10 = 60

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Find the Greatest of Three Numbers

#include<stdio.h>
void main()
{
 int x,y,z;
 printf("Enter values of x, y and z : ");
 scanf("%d,%d,%d",&x,&y,&z);
 if(x>=y && x>=z)
   printf("\n%d is greatest",x);
 else if(y>=z)
   printf("\n%d is greatest",y);
 else
   printf("\n%d is greatest",z);
}

  

Output
Enter values of x, y and z : 4, 9, 2
9 is greatest

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Find Greatest number using Conditional Operator

#include<stdio.h>

void main()
{
 int n1,n2,n3;
 printf("Enter Numbers (n1 n2 n3) : ");
 scanf("%d %d %d",&n1,&n2,&n3);
 printf("Greatest= %d",n1>n2?n1>n3?n1:n3:n2>n3?n2:n3);
}

  

Output
Enter Numbers (n1 n2 n3) : 4  9  2
Greatest= 9

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Print 1 to 10 using For Loop

#include<stdio.h>
int main()
{
 int x=1;
 
 for(x=1; x<=10; x++)
    printf("\n%d",x);

 return 0;
}

  

Output
  1
  2
  3
  4
  5
  6
  7
  8
  9
  10

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Print 1 to 10 using While Loop

#include<stdio.h>
#include<conio.h>
int main()
{
 int x=1;
 while(x<=10)
 {
   printf("\n%d",x);
   x++;
 }
 getch();
 return 0;
}

  

Output
  1
  2
  3
  4
  5
  6
  7
  8
  9
  10

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Swap two Numbers

#include<stdio.h>

void main()
{
 int x,y,z;
 printf("Enter Values x and y : ");
 scanf("%d%d",&x,&y);
 z=y;
 y=x;
 x=z;
 printf("\nValue of x=%d",x);
 printf("\nValue of y=%d",y);
}

  

Output
Enter Values x and y : 5 4
Value of x= 4
Value of y= 5

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Sum of two numbers

#include<stdio.h>

void main()
{
 int a,b,sum;
 printf("Enter Numbers a and b : ");
 scanf("%d %d",&a,&b);
 sum=a+b;
 printf("\n%d + %d = %d",a,b,sum);
}

   

Output
Enter Numbers a and b :5 4
5 + 4 = 9 

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Print "Hello, World!" without semicolon

Solution: 1

#include<stdio.h>
void main(){
    if(printf("Hello world")){
    }
}

Solution: 2

#include<stdio.h>
void main(){
    while(!printf("Hello world")){
    }
}

Solution: 3

#include<stdio.h>
void main(){
    switch(printf("Hello world")){
    }
}

  

Output
Hello, World!

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Print "Hello, World!"

#include<stdio.h>

int main()
{
 printf("\nHello, World! ");
 return 0;
}

  

Output
Hello, World!

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