# Find product of vector elements in R

• Last Updated : 26 Mar, 2021

In this article, we will see how to find the product of vector elements in R programming language.

### Method 1: Using iteration

Approach

• Create dataframe
• Iterate through the vector
• Multiply elements as we go
• Display product

The following code snippet indicates the application of for loop over decimal point vector. The product obtained is also of the decimal type.

Example:

## R

 `# declaring a floating point vector ``vec <- ``c``(1.1,2,3.2,4)``size = ``length``(vec)`` ` `# initializing product as 1``prod = 1`` ` `# looping over the vector elements``for``(i ``in` `1:size)`` ``{``  ``# multiplying the vector element at ith index ``  ``# with the product till now``  ``prod = vec[i]*prod`` ``}``print``(``"Product of vector elements:"``)`` ` `# in-built application of prod function``print``(prod)`

Output

 “Product of vector elements:”

 28.16

The other example demonstrates the behavior of any mathematical operation on a missing, that is NA value. The product returned is NA, in such a case.

Example 2:

## R

 `# declaring a floating point vector ``vec <- ``c``(1.1,2,``NA``,11,4)``size = ``length``(vec)`` ` `# initializing product as 1``prod = 1`` ` `# looping over the vector elements``for``(i ``in` `1:size)`` ``{``  ``# multiplying the vector element at``  ``# ith index with the product till now``  ``prod = vec[i]*prod``  ``cat``(``"Product after iteration:"``) ``  ``print``(prod)`` ``}``print``(``"Final product of vector elements:"``)`` ` `# in-built application of prod function``print``(prod)`

Output

Product after iteration: 1.1

Product after iteration: 2.2

Product after iteration: NA

Product after iteration: NA

Product after iteration: NA

 “Final product of vector elements:”

 NA

### Method 2: Using prod()

prod() function in R is an in-built method which can directly compute the multiplicative product of the individual elements in the vector which are specified as its arguments. In case, a single argument is present, it computes the multiplicative output of the individual elements of the vector.

Syntax:

prod(vector)

Example:

## R

 `# declaring a integer vector ``vec <- ``c``(1,2,3,4)``print``(``"Product of vector elements:"``)`` ` `# in-built application of prod function``print``(``prod``(vec))`

Output

 “Product of vector elements:”

 24

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