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Program 1
import pandas as pd
df1=pd.DataFrame({'empname':['Vivek','Dipesh','Rajesh'],'Age':[45,44,36]})
df2=pd.DataFrame({'empname':['Vivek','Dipesh','Vishal'],'Salary(in Lakhs)':[23,16,10]})
df3=pd.concat([df1,df2],ignore_index=True)
print(df3)