upper() function - NumPy

The numpy.char.upper() function is used to convert all characters in the elements of a NumPy string array to uppercase. It works element-wise and returns a new array with the modified strings.

This example shows how to use np.char.upper() to convert lowercase characters into uppercase.

['HELLO WORLD']

Syntax

numpy.char.upper(arr)

• Parameters:arr (array_like) -> Input array of strings.
• Return Value:ndarray -> Array with all string elements converted to uppercase.

Examples

Example 1: In this example, we convert alphanumeric strings to uppercase.

Array: ['p4q r' '4q rp' 'q rp4' 'rp4q']
Result: ['P4Q R' '4Q RP' 'Q RP4' 'RP4Q']

Example 2: In this example, we convert a simple word array into uppercase.

Array: ['geeks' 'for' 'geeks']
Result: ['GEEKS' 'FOR' 'GEEKS']

Example 3: Here, we apply upper() to sentences with mixed cases.