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import streamlit as st
import numpy as np
# Function to calculate loan details
def calculate_loan(loan_amount, loan_term_years, interest_rate):
monthly_rate = interest_rate / 100 / 12
loan_term_months = loan_term_years * 12
monthly_payment = loan_amount * (monthly_rate * (1 + monthly_rate) ** loan_term_months) / ((1 + monthly_rate) ** loan_term_months - 1)
total_payments = monthly_payment * loan_term_months
total_interest = total_payments - loan_amount
return monthly_payment, total_payments, total_interest
# Main Streamlit app
def main():
st.subheader("Real Estate Loan Calculator")
st.markdown("---")
st.subheader("Loan Details")
col1, col2, col3 = st.columns(3)
with col1:
loan_amount = st.number_input("Loan Amount (€)", value=150000, step=1000)
loan_term_years = st.number_input("Loan Term (Years)", value=20, step=1)
interest_rate = st.number_input("Interest Rate (%)", value=3.49, step=0.01)
monthly_payment, total_payments, total_interest = calculate_loan(loan_amount, loan_term_years, interest_rate)
with col2:
st.markdown(
f"""
<div style="border: 2px solid #ccc; padding: 10px; background-color: #0e1117; border-radius: 5px; text-align: center;">
<h4 style="font-weight: bold;">Loan Details</h4>
<p>Monthly:<br> <span style="font-weight: bold; color: orange;">{monthly_payment:.2f} €</span><br>
Total:<br> <span style="font-weight: bold; color: teal;">{total_payments:.2f} €</span><br>
Total Interest:<br> <span style="font-weight: bold; color: green;">{total_interest:.2f} €</span></p>
</div>
""",
unsafe_allow_html=True
)
with col3:
st.markdown(
f"""
<div style="padding: 10px; ">
<h5 style="font-style: italic;">Project Costs</h5>
<p style="font-style: italic;"><span style="font-weight: bold;">Costs closing: 10,000 €</span></p>
<p style="font-style: italic;">Notary fees and others: 5,000 €</p>
<p style="font-style: italic;">Notary fees and others: 5,000 €</p>
</div>
""",
unsafe_allow_html=True
)
if __name__ == "__main__":
main()
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