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Program to check that entered no is divisible by 5 or not.

//program to check that entered no is divisible by 5 or not.
#include<stdio.h>
#include<conio.h>
main()
{ int n,r,s,i;
 printf("Enter the no ");
 scanf("%d",&n);
 s=0;
for(i=0;i<1;i++)
 { r=n%10;
  n=n/10;
 }
 if(r==0||r==5)
 printf("Entered no is divisible by 5");
 else
 printf("Entered no is Not divisible by 5");
getch();
}

Program to count number of digits in a number.

// program to count number of digits in a number.
#include<stdio.h>
#include<conio.h>
main()
{
     int  num,count=0;
  printf("Enter a number: ");
  scanf("%d",&num);
   while(num)
  {
      num=num/10;
      count++;
  }
  printf("Total digits is:  %d",count);
getch();
}

Program to check that entered no is divisible by 9 or not.

//program to check that entered no is divisible by 9 or not.
#include<stdio.h>
#include<conio.h>
main()
{ int n,r,s;
 printf("Enter the no ");
 scanf("%d",&n);
 s=0;
 while(r!=0)
 { r=n%10;
  n=n/10;
  s=s+r;
 }
 if(s%9==0)
 printf("Entered no is divisible by 9");
 else
 printf("Entered no is Not divisible by 9");
getch();
}

Program to check that entered no is divisible by 10 or not.

//program to check that entered no is divisible by 10 or not.
#include<stdio.h>
#include<conio.h>
main()
{ int n,r,s,i;
 printf("Enter the no ");
 scanf("%d",&n);
 s=0;
for(i=0;i<1;i++)
 { r=n%10;
  n=n/10;
 }
 if(r==0)
 printf("Entered no is divisible by 10");
 else
 printf("Entered no is Not divisible by 10");
getch();
}

Program to check that entered no is divisible by 3 or not.

//program to check that entered no is divisible by 3 or not.
#include<stdio.h>
#include<conio.h>
main()
{ int n,r,s;
 printf("Enter the no ");
 scanf("%d",&n);
 s=0;
 while(r!=0)
 { r=n%10;
  n=n/10;
  s=s+r;
 }
 if(s%3==0)
 printf("Entered no is divisible by 3");
 else
 printf("Not divisible by 3");
getch();
}

Program To print the two dimensional array.

//To print the two dimensional array.
#include<stdio.h>
#include<conio.h>
main()
{
      int a[3][3],i,j;
      printf("Enter the value of 3X3 array:-");
      for(i=0;i<3;i++)
      {
         for(j=0;j<3;j++)
          { scanf("%d",&a[i][j]);
          }
      } 
        printf("The 2D array is :");
        for(i=0;i<3;i++)
        { printf("\n\n");
         for(j=0;j<3;j++)
          { printf("%d  ",a[i][j]);
          }
        } 
        getch();
 }
          

To print the reverse of character.

//To print the reverse of character.
#include<stdio.h>
#include<conio.h>
main()
{     int i;
      char a[5];
      printf("Enter the name- ");
      for(i=0;i<5;i++)
      scanf("%c",&a[i]);
      printf("Your name is: ");
      for(i=0;i<5;i++)
      printf("%c",a[i]);
      printf("\nYour reverse  name is: ");
      for(i=4;i>=0;i--)
      printf("%c",a[i]);
      getch();
      }

Program To take character from the user by array .

//To take character from the user by array .
#include<stdio.h>
#include<conio.h>
main()
{     int i;
      char a[5];
      printf("Enter the name ");
      for(i=0;i<=4;i++)
      scanf("%c",&a[i]);
      printf("Your name is ");
      for(i=0;i<=4;i++)
      printf("%c",a[i]);
      getch();
      }

Program for identify +ve and -ve no in an array .

Program for identify +ve and -ve no in an array .

#include<stdio.h>
#include<conio.h>
 main()
{
 int n[15],m,e,i;
 m=n[0];
 printf("Enter the 10 no ");
 for(i=0;i<10;i++)
 {
  scanf("%d",&n[i]);
 }

  printf("\nThe positive no are:\n");
  for(i=0;i<10;i++)
  {
   if(n[i]>0)
   {
    printf("%d,",n[i]);
   }
  }
  printf("\nThe negative no are:\n");
  for(i=0;i<10;i++)
  {
   if(n[i]<0)
   {
    printf("%d,",n[i]);
   }
  }
  getch();

}

Program to find odd and even nos. in an array.

//Program to find odd and even nos. in an array.
#include<stdio.h>
#include<conio.h>
 main()
{
 int n[10],i;
 printf("Enter the 10 no ");
 for(i=0;i<10;i++)
 {
  scanf("%d",&n[i]);
 }
   printf("The even nos: ");
  for(i=0;i<10;i++)
  {
   if(n[i]%2==0)
   {  
    printf("%d,",n[i]);
   }
         }
   printf("\nThe odd nos : ");
   for(i=0;i<10;i++)
   {
   if(n[i]%2!=0)
    { //o[i]=n[i];
   printf("%d,",n[i]);
    }
  
  }

                         
  getch();
}

Program for finding Largest no.

//Program for finding Largest no.
#include<stdio.h>
#include<conio.h>
 main()
{
 int n[15],m,i;
 printf("Enter the 10 no ");
 for(i=0;i<10;i++)
 {
  scanf("%d",&n[i]);
 }
 printf("The entered array is ");
  for(i=0;i<10;i++)
  {printf("   ");
  printf("%d",n[i]);
  }
  m=n[0];
  for(i=0;i<10;i++)
  {
   if(n[i]>m)
   {
    m=n[i];
   }
  }
  printf("\nLargest is %d",m);
    getch();
}

Program for addition of 10 no's.

//Addition of 10 no's.
#include<stdio.h>
#include<conio.h>
 main()
{
 int n[15],o=0,e,i;
    printf("Enter the 10 no ");
 for(i=0;i<5;i++)
 {
  scanf("%d",&n[i]);
 }
    printf("The entered array is ");
     for(i=0;i<5;i++)
  {printf("   ");
         printf("%d",n[i]);
  }
  for(i=0;i<5;i++)
  {
   o=o+n[i];
  }
  printf("Sum =%d",o);
  getch();
}
 

Program to Print fibonacci series.

// The fibonacci series.
#include<stdio.h>
#include<conio.h>
main()
{
      int i,n,f,s,t;
      printf("How many element you want to print:");
      scanf("%d",&n);
      f=0;
      s=1;
      printf("The  fibonacci series up to %d is : %d,%d",n,f,s);
      for(i=0;i<n-2;i++)
      {                
       t=f+s;
       f=s;
       s=t;
       printf(",%d",t);
       }
       getch();
       }
      
     

Program to print the pyramid of no.

//Program to print the  pyramid of no.
              1
          1  2  3 
       1 2  3  4  5
    1 2 3  4  5  6  7
#include<stdio.h>
#include<conio.h>
main()
{
      int x,y,i,g;
      y=1;
      for(x=3;x>=0;x--)
      {
      for(i=1;i<=x;i++)
       {printf("   ");
       }g=1;
       for(i=0;i<y;i++)
       {printf(" %d",g);g++;
       }
      
       y=y+2;
       printf("\n\n");
       }
       getch();
       }

Program to Print the pyramid.

//Program to Print the pyramid.
       *
     ***
   *****
 *******
#include<stdio.h>
#include<conio.h>
main()
{
      int x,y,i;
      y=1;
      for(x=3;x>=0;x--)
      {
      for(i=1;i<=x;i++)
       {printf(" ");
       }
       for(i=0;i<y;i++)
       {printf("*");
       }
      
       y=y+2;
       printf("\n\n");
       }
       getch();
       }

Program to Print the pyramid.

//Program to Print the pyramid.
             *
         ***
     *****
 *******

#include<stdio.h>
#include<conio.h>
main()
{
      int x,y,i;
      y=1;
      for(x=3;x>=0;x--)
      {
       for(i=1;i<=x;i++)
       {printf("  ");
       }
       for(i=1;i<=y;i++)
       {printf("*");
       }
       y=y+2;
       printf("\n");
       }
       getch();
       }

Program to print the reverse pyramid of no.

//Program to print the reverse pyramid of no.
1 2 3 4 5 6 7 8 9

  1 2 3 4 5 6 7

    1 2 3 4 5

       1 2 3

          1
#include<stdio.h>
#include<conio.h>
main()
{
      int x,y,i,g;
      y=9;
      for(x=4;x>=0;x--)
      {
      for(i=4;i>x;i--)
       {printf(" ");
       }g=1;
       for(i=0;i<y;i++)
       {printf("%d",g);g++;
       }
      
       y=y-2;
       printf("\n");
       }
       getch();
       }

Program to Print the pyramid.

//Print the pyramid like..
*********
  *******
   *****
     ***
       *
#include<stdio.h>
#include<conio.h>
main()
{
      int x,y,i;
      y=9;
      for(x=4;x>=0;x--)
      {
      for(i=4;i>x;i--)
       {printf(" ");
       }
       for(i=0;i<y;i++)
       {printf("*");
       }
      
       y=y-2;
       printf("\n");
       }
       getch();
       }

Program to check entered character is special symbol or not.

//Program to check entered character is special symbol or not.
#include<stdio.h>
#include<conio.h>
main()
{ int i;
char c;
printf("Enter character");
scanf("%c",&c);
i=c;
if((c>=0&&c<=47)||(c>=58&&c<=64))
printf("You entered a special character ");
else
printf("Not special character");
getch();
}

Program to check entered character is capital or small.

//Program to check entered character is capital or small.
#include<stdio.h>
#include<conio.h>
main()
{ int i;
char a;
printf("Enter a character capital or small-");
scanf("%c",&a);
i=a;
if(i>=65&&i<=90)
{printf("you entered capital letter");}
 if(i>=97&&i<=122)
printf("You entered small letter");
getch();
}
 

Program to Interchange the value.

//Program to Interchange the value.
#include<stdio.h>
#include<conio.h>
main()
{ int a,b,temp;
 printf("Enter the value of a and b -");
 scanf("%d%d",&a,&b);
 temp=a;
 a=b;
 b=temp;
 printf("The changed value of a and b -%d & %d",a,b);
 getch();
}

Program to print negative no.

//Program to print negative no.
#include<stdio.h>
#include<conio.h>
main()
{
      int i,n;
      printf("Enter any no  ");
      scanf("%d",&n);
      for(i=1;i<=n;i++)
      {
       printf("%d\n",-i);
       }
       getch();
       }

Program to print the triangle of no.

// Program to calculate the triangle of no.
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
#include<stdio.h>
#include<conio.h>
main()
{
       int x,i;
       for(x=1;x<=5;x++)
       {
          for(i=1;i<=x;i++)
         {
                          printf("  %d",i);
          }
                          printf("\n\n");
       }
 getch();
   }

Program to Print the triangle of star.

// Program to calculate the triangle of star.





*
* *
* * *
* * * *
* * * * *
#include<stdio.h>
#include<conio.h>
main()
{
       int x,i;
       for(x=1;x<=5;x++)
       {
        for(i=1;i<=x;i++)
        {
                          printf("  *");
                          }
                          printf("\n\n");
                          }
                          getch();
                          }

Entered no is Armstrong no or not.

//Entered no is Armstrong no or not.
#include<stdio.h>
#include<conio.h>
main()
{ int d,r,n,s;
 printf("Enter no:");
 scanf("%d",&n);
 d=n;
 s=0;
do
 {
  r=d%10;
  d=d/10;
  s=s+(r*r*r);
 }while(d!=0);
 if(s==n)
 printf("Armstrong no");
 else
 printf("Not Armstrong no");
getch();
}

Program to reverse the entered no .

//Program to reverse the entered no .
#include<stdio.h>
#include<conio.h>
main()
{ int d,r,n;
 printf("Enter no:");
 scanf("%d",&n);
 d=n;
do
 {
  r=d%10;
  printf("%d",r);
  d=d/10;

}while(d!=0);
getch();
}

Program to find factorial of any no.

//Program to find factorial of any no.
#include<stdio.h>
#include<conio.h>
main()
{
      int i,fact,n;
      printf("Enter the no:");
      scanf("%d",&n);
      fact=1;
      for(i=1;i<=n;i++)
      { 
        fact=fact*i;
        }
        printf("The factorial of %d no is :- %d",n,fact);
        getch();
 }

Program to print first n natural no and their sum

//Program to print first n natural no and their sum.
#include<stdio.h>
#include<conio.h>
main()
{
      int i,sum,n;
      printf("How many natural no?");
      scanf("%d",&n);
      sum=0;
      for(i=1;i<=n;i++)
      {  printf("%d\n",i);
         sum=sum+i;
      }
      printf("The sum of first %d natural no is :-%d",i,sum);
      getch();
      }

Show all odd numbers from 0 to your entered no.

//Show all odd numbers from o to your entered no.
#include<stdio.h>
#include<conio.h>
main()
{ int i,n;
  printf("Enter any no-");
  scanf("%d",&n);
  printf("Odd no is-");
  for(i=1;i<=n;i=i+2)
  {
     printf("%d\n",i);
 
     }
     getch();
     }
    

Count backwards of any no.

//Count backwards of any no using a for loop.
#include<stdio.h>
#include<conio.h>
main()
{ int i,n;
 printf("Enter any no-");
 scanf("%d",&n);
 printf("backwards of no--");
 for(i=n;i>=0;i--)
 { printf("%d\n",i);
}
getch();
}

Program to Print Table of any no

//table of any no
#include<stdio.h>
#include<conio.h>
main()
{
      int i,n,m;
      printf("Enter any no-");
      scanf("%d",&n);
      for(i=1;i<=10;i++)
      {    m=n*i;
                        printf("%d",m);
                        printf("\n");
      }
      getch();
      }

Table of two

//table of two
#include<stdio.h>
#include<conio.h>
main()
{
      int i,m;
      for(i=1;i<=10;i++)
      {    m=2*i;
                        printf("%d",m);
                        printf("\n");
      }
      getch();
      }

Simple for loop program

//Loop Control Structure
#include<stdio.h>
#include<conio.h>
main()
{
      int i;
      for(i=0;i<=10;i++)
      {
                        printf("%d",i);
                        printf("\n");
      }
      getch();
      }

Enter any charecter and get ASCII value.

//Enter any charecter and get ASCII value.
#include<stdio.h>
#include<conio.h>
main( )
{ char a;
int n;
printf("enter the char--");
scanf("%c",&a);
printf("%d",a);
getch();
}

Program to sum two no

//sum of two no
#include<stdio.h>
#include<conio.h>
main( )
{  int  n,m,s;
   printf("Enter two no --");
   scanf("%d%d",&n,&m);
   s=n+m;
   printf("The sum of two no-%d ",s);
   getch();
}

Calculation of simple interest

/* Calculation of simple interest */
#include<stdio.h>
#include<conio.h>
main( )
{
int p, n ;
float r, si ;
printf( "Enter values of p, n(year),r(rate)" ) ;
scanf ( "%d %d %f", &p, &n, &r ) ;
si = p * n * r / 100 ;
printf ("%f",si);
getch();
}

welcome to c

// Welcome to c programming.
#include<stdio.h>
#include<conio.h>
 main()
{
       printf("Welcome to c programming ");
       printf("\n");
       printf("This is our first program");
       getch();
       }
This is basic c program.This program doesn't take any input from the user .