Program to Reverse a Number | C Program

Input

#include<stdio.h>
#include<conio.h>
void main()
{
int num,res=0;
clrscr();
printf("Reverse a Number\n");
printf("Enter the Number to Reversed\n");
scanf("%d",&num);
printf("Number before reverse %d\n",num);
while(num>0)
{
res=10*res+num%10;
num=num/10;
}
printf("Number After reverse\t %d",res);
getch();
}

Turbo C

Program to check whether a Number is Prime or Not | C Program

Input 

#include<stdio.h>
#include<conio.h>
void main()
{
int i,n,flag=0;
clrscr();
printf("Enter the Number to be checked\n");
scanf("%d",&n);
for(i=2;i<n/2;i++)
{
if(n%i==0)
{
flag=1;
break;
}
}
if(flag==0) printf("Number is prime");
if(flag==1) printf("Number is not prime");
getch();
}

Turbo C

Program to calculate the Power of a Number | C program

Input

#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,res=1,i;
clrscr();
printf("Enter the number\n");
scanf("%d",&a);
printf("Enter the Power\n");
scanf("%d",&b);
for(i=b;i>0;i--)
{
res=res*a;
}
printf("a^b=%d\t",res);
getch();
}

Turbo C

Program to Check Palindrome of a String | C Program

Input

#include<stdio.h>
#include<conio.h>
void main()
{
int i,flag=0;
char a[20],b[20],n;  clrscr();
printf("Enter the String to be checked\t");
gets(a);
n=strlen(a);
for(i=0;i<n;i++)
{
b[n-i-1]=a[i];
}
for(i=0;i<n;i++)
{
if(a[i]!=b[i]) {    flag=1; break; }
}
if(flag==1) printf("\n String is not palindrome");
if(flag==0) printf("\n String is palindrome");
getch();
}

Turbo C

Program to check Palindrome of a Number | C Program

Input

#include<stdio.h>
#include<conio.h>
void main()
{
int num,rev=0,temp;
clrscr();
printf("Enter the number of want to check for palindrome\n");
scanf("%d",&num);
temp=num;
while(temp>0)
{
rev=(10*rev) + (temp%10);
temp=temp/10;
}
if(num==rev)
printf("\nNumber is Palindrome");
else
printf("\n Number is not Palindrome");
getch();
}

Turbo C

Program to calculate factorial of a Number | C program

Input

#include<stdio.h>
#include<conio.h>
void main()
{
int n,i,res=1;
clrscr();
printf("Enter the Number\n");
scanf("%d",&n);
for(i=n;i>0;i--)
{
res=res*i;
}
printf("The Factorial is\n\t%d",res);
getch();
}

Turbo C