C++ program for multiplication of array elements

Given with an array of integer elements and the task is to multiply the elements of an array and display it.

Example

Input-: arr[]={1,2,3,4,5,6,7}
Output-: 1 x 2 x 3 x 4 x 5 x 6 x 7 = 5040
Input-: arr[]={3, 4,6, 2, 7, 8, 4}
Output-: 3 x 4 x 6 x 2 x 7 x 8 x 4 = 32256

Approach used in the below program is as follows −

• Initialize temporary variable to store the final result with 1
• Start loop from 0 to n where n is the size of an array
• Keep multiplying the value of temp with arr[i] for final result
• Display the value of temp which will be resultant value

Given below is the example of multiplying the inputs and generating required output

Algorithm

Start
Step 1-> Declare function for multiplication of array elements
   int multiply(int arr[], int len)
      set int i,temp=1
         Loop For i=0 and i<len and i++
            Set temp=temp*arr[i]
         End
         return temp
step 2-> In main()
   Declare int arr[]={1,2,3,4,5,6,7}
      Set int len=sizeof(arr)/sizeof(arr[0])
      Set int value = multiply(arr,len)
      Print value
Stop

Example

 Live Demo

#include<stdio.h>
//function for multiplication
int multiply(int arr[], int len) {
   int i,temp=1;
   for(i=0;i<len;i++) {
      temp=temp*arr[i];
   }
   return temp;
}
int main() {
   int arr[]={1,2,3,4,5,6,7};
   int len=sizeof(arr)/sizeof(arr[0]);
   int value = multiply(arr,len);
   printf("value of array elements after multiplication : %d",value);
   return 0;
}

Output

IF WE RUN THE ABOVE CODE IT WILL GENERATE FOLLOWING OUTPUT

value of array elements after multiplication : 5040