# Add a Constant to all Elements of Array – NumPy

Contents

## Numpy Array – Add a constant to all elements of the array

Adding a constant to a NumPy array is as easy as adding two numbers.

To add a constant to each and every element of an array, use addition arithmetic operator +. Pass array and constant as operands to the addition operator as shown below.

``output = arr + c``

where

• arr is a numpy array.
• c is a constant.
• output is the resulting numpy array.

## Examples

### 1. Add a constant of 3 to each element in the array

In the following python example, we will add a constant 3 to an array arr. The resulting array is stored in output and print to the standard output.

Python Program

``````import numpy as np

#2D array
arr = (np.arange(8)*2).reshape(2,4)

#print array
print("The array\n", arr)

#adding a constant to all the elemnets of array
output = arr + 3

print("\nAfter adding a constant to all the elemnets of array\n", output)``````
Run Code Copy

Output

## Summary

In this NumPy Tutorial, we learned how to add a constant to each of the element in numpy array using addition operator.

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