How to get the number of rows in DataFrame?

Let us understand that how to get the number of rows in a DataFrame with the help of an example?

# Importing pandas package

import pandas as pd

# Creating a dictionary of student marks

d = {
    "Peter":[65,70,70,75],
    "Harry":[45,56,66,66],
    "Tom":[67,87,65,53],
    "John":[56,78,65,64]
}

# Now, we will create DataFrame and 
# we will assign index name as subject names
df = pd.DataFrame(d,index=["Maths","Physics","Chemistry","English"])

# Printing the DataFrame
print(df,"\n")

# Using df.shape[0] method to 
# get the number of rows directly
print("Total number of rows are:",df.shape[0])

Output:

           Peter  Harry  Tom  John
Maths         65     45   67    56
Physics       70     56   87    78
Chemistry     70     66   65    65
English       75     66   53    64 

Total number of rows are: 4

Explanation:

Here, we have created a DataFrame with four rows having index names Maths, Physics, Chemistry, and English respectively. df.shape[0] method will return the count of the number of rows hence the output is 4.