1. Write a program in c generate Fibonacci series up to given number.

            #include <stdio.h>
                int main() {
                    int i, n, t1 = 0, t2 = 1, nextTerm;
                    printf("Enter the number of terms: ");
                    scanf("%d", &n);
                    printf("Fibonacci Series: ");
                
                    for (i = 1; i <= n; ++i) {
                        printf("%d, ", t1);
                        nextTerm = t1 + t2;
                        t1 = t2;
                        t2 = nextTerm;
                    }
                
                    return 0;
                }
        

2. Write a program in c to reverse the digit of a given number.

        #include <stdio.h>
        #include <string.h>
            int main()
            {
               char s[10];
            
               printf("enter a number to reverse: ");
               gets(s);
            
               strrev(s);
            
               printf("reverse no is: %s\n", s);
            
               return 0;
            }  

     

3. Write a program in c to make a table of a given number.

        #include <stdio.h>
        int main()
        {
            int num, result;

            printf("enter no: ");
            scanf("%d", &num);

            for(int i = 1; i <= 10; i++){
                result = num * i;
                printf("%d * %d = %d \n",num, i, result);
            }

            return 0;
        }
 
     

4. Write a program in c to find the factorial of given number.

    #include <stdio.h>
 
    int main() {
    int n, fact = 1;
    printf("Enter an integer: ");
    scanf("%d", &n);

    if (n < 0) {
        printf("negative number doesn't exist.");
     } else {
        for (int i = 1; i <= n; ++i) {
            fact *= i;
        }
        printf("factorial of %d is = %d", n, fact);
    }

    return 0;
    }

    

5. Write a program in c to sum of digits of a given number.

    #include <stdio.h>

        int main()
        {
            int num, sum=0;
        
            printf("enter number: ");
            scanf("%d", &num);
        
            while(num!=0)
            {
                sum += num % 10;
                num = num / 10;
            }
        
            printf("sum of digits = %d", sum);
        
            return 0;
        }

     

9. Write a program in c to print all alphabet from a to z.

        #include <stdio.h>

        int main()
        {
            char ch;
        
            printf("prints alphabets: \n");
            for(ch='a'; ch<='z'; ch++)
            {
                printf("%c\n", ch);
            }
        
            return 0;
        }

     

10. WAP in C to print Even number up to given number.

        #include<stdio.h>
        void main()
        {
             int i,n;
        
             printf("enter number: ");
             scanf(" %d",&n);
        
             printf("even numbers up to inputted number are - ");
        
             for(i=2;i<=n;i+=2)
             {
                     printf(" %d \n",i);
             }
        } 

     

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