How to iterate line by line in Pandas?

Question

Python

Let there be a dataframe:

0    1    2
1   248  109
2   765  783
3   143  146
4   111  167

You need to go through the lines and enter the minimum number from columns 1 and 2 in column 3.
Please tell me where to dig?

Answer 1

In your case, lambda functions are not really needed, there are shorter and faster options:

df['col3'] = df.min(axis=1)
# или
import numpy as np
df['col3'] = np.minimum(df.col1, df.col2)