# Overview

The **`upper()` function** of the pandas library in Python converts all characters in a string to uppercase.

#   
#  Syntax
``` 
upper()
```
> **Note:** The `upper()` function can't be used on the entire column of a DataFrame.

## 
## Code example
The following code demonstrates how to use the `upper()` function in pandas:

import pandas as pd

# Create a DataFrame
df = pd.DataFrame({
    "name": ["Maria","Paul","Eva","Oliver","Sebastian","Camila"],
    "age":[20,22,32,26,29,30],
    "salary":[2000,2500,4000,3500,4200,3000],
    "gender":["female","male","female","male","male"
    ,"female"]
})

# Convert string to uppercase using upper()
print(df["name"][1].upper())

## Code explanation

- Line 1: We import the `pandas` library.

- Lines 4–10: We create a DataFrame, `df`, from a dictionary.

- Line 13: We use the `upper()` function to convert `name` at index `1` to uppercase. Then, we print the output.

> **Note**: If we use the `upper()` method on the entire column, we will get an error.
 




How to use the upper() function in pandas

The pandas upper() function converts a string to uppercase but can't be used on entire DataFrame columns.