Program To Calculate The Sum of Positive Integers Up To An Upper Limit

Program:

 #include <iostream>    
 using namespace std;    
 int main() {    
  int upper_Limit = 0 , sum = 0;  
  cout<<"The highest positive integer you want to add upto: ";  
  cin>>upper_Limit;  
  for(int i=1; i<=upper_Limit; i++){  
      sum = sum + i;  
  }  
  cout<<"The sum of positive integer from 1-"<<upper_Limit<<" is "<<sum<<endl; 
  return 0;   
 }   

Output: 

Working Of The Program:

The program works as follows:

1. The program begins by including the iostream library, which contains the necessary functions for input/output operations.
3. The 'using namespace std' line declares that the code will use the standard namespace, which contains the standard C++ library functions.
4. The main function is the entry point of the program.
5. The program initializes two integer variables, 'upper_Limit' and 'sum', to 0.
6. The program prompts the user to enter the highest positive integer they want to add up to, and stores the value in the 'upper_Limit' variable using the 'cin' function.
7. A 'for' loop is used to iterate from 1 to the user input 'upper_Limit'.
8. In each iteration of the loop, the value of 'i' is added to the 'sum' variable.
9. Once the loop has finished iterating, the program outputs the sum of positive integers from 1 to the user input 'upper_Limit'.
10. The program ends with the 'return 0' statement, indicating that the program has been completed successfully.

Program To Find The Maximum Number In An Array

Program:

  #include <iostream>   
  using namespace std;   
  int main() {   
   int arr[5] = {1, 2, 3, 4, 5}, max=arr[0];    
   for(int i=0; i<5;i++){  
           if(arr[i]>max){  
                max=arr[i];  
           }  
      }  
      cout<<"\n\tThe maximum number in the array [1, 2, 3, 4, 5] is "<<max<<endl;  
    return 0;  
 }  

Output:

Working Of The Program:

The program works as follows:

1. The code defines a C++ program that finds the maximum element in an array of integers.
2. The program begins by declaring an integer array arr of size 5, and initializes its elements to the values {1, 2, 3, 4, 5}.
3. The program also declares an integer variable max and initializes it to the first element of the array arr[0].
4. The program then enters a for loop that iterates over each element of the array, using the loop counter variable i.
5. Inside the loop, the program checks if the current element of the array arr[i] is greater than the current value of max.
6. If the current element is greater than max, the program updates the value of max to be the current element arr[i].
7. After the loop completes, the program outputs the maximum element of the array to the console using cout.
8. The output message includes the phrase "The maximum number in the array", followed by the array elements in square brackets and the calculated maximum value.
9. Finally, the program terminates.

Program To Calculate The Sum Of All Elements Of An Array

Program:

 #include <iostream>  
 using namespace std;  
 int main() {  
   int arr[5] = {1, 2, 3, 4, 5}, sum = 0;  
   for(int i=0; i<5; i++){  
        sum = sum + arr[i];  
      }  
      cout<<"The sum of the array [1, 2, 3, 4, 5] is "<<sum<<endl;  
 }  

Output: 

Working Of The Program:

The working of the program is as follows:
1. The code defines a C++ program that calculates the sum of an array of integers.
2. The program begins by declaring an integer array arr of size 5, and initializes its elements to the values {1, 2, 3, 4, 5}.
3. The program also declares an integer variable sum and initializes it to 0.
4. The program then enters a for loop that iterates over each element of the array, using loop counter variable i.
5. Inside the loop, the program adds the current element of the array arr[i] to the sum variable.
6. After the loop completes, the program outputs the sum of the array to the console using cout.
7. The output message includes the phrase "The sum of the array", followed by the array elements in square brackets and the calculated sum.
8. Finally, the program terminates.

Program That Take A Number And Prints Its Table Upto 10

Program:

 #include <iostream>  
 using namespace std;  
 int main() {    
   int num;  
   cout<<"Enter the number to print table: ";  
   cin>>num;  
   cout<<"Table Of "<<num<<endl;  
   for(int i=1; i<=10; i++){  
        cout<<num<<" x "<<i<<" = "<<num * i<<endl;  
      }  
   return 0;  
 }  

Output: 

Working Of The Program:

1.The #include <iostream> directive includes the input/output stream library that allows us to 2. read input and write output to the console.

3. The using namespace std statement indicates that we want to use the standard namespace, which contains standard C++ library functions and objects.
4. The int num declares an integer variable num that will store the number whose table we want to print.
5. The cout<<"Enter the number to print table: "; statement displays the message "Enter the number to print table: " to the console.
6. The cin>>num; the statement reads an integer input from the user and stores it in the variable num.
7. The cout<<"Table Of "<<num<<endl; statement displays the message "Table Of (num)" to the console, where (num) is the value of the num variable.
8. The for(int i=1; i<=10; i++) loop runs 10 times and initializes a loop counter i to 1, increments it by 1 each time, and checks whether it is less than or equal to 10.
9. The cout<<num<<" x "<<i<<" = "<<num * i<<endl; statement displays the product of num and i in the format "num x i = product" to the console for each iteration of the loop.
10. The return 0; statement exits the program and returns a value of 0 to the operating system, indicating that the program executed successfully.