what am I missing? I thought I copied this well from the solo learn examples.

Question

/data/data/com.hipipal.qpy3/files/bin/qpython-android5.sh "/storage/emulated/0/com.hipipal.qpyplus/.last_tmp.py" && exit
pyplus/.last_tmp.py" && exit <
options:
Enter 'add' to add two numbers:
Enter 'sub' to subtract two numbers:
Enter 'mult' to multiply two numbers:
Enter 'div' to divide two numbers:
Enter 'quit' to end program:
:add
Traceback (most recent call last):
File "/storage/emulated/0/com.hipipal.qpyplus/.last_tmp.py", line 14, in <module>
num1 = (float("Enter a number:"))
ValueError: could not convert string to float: 'Enter a number:'
1|u0_a24@jactivelteatt:/ $

Answer 1

the error appears because with:
float("Enter a number:")
you are asking python interpreter to convert "Enter a number" into number which confuses it. what you may have wanted is to write something like:
num1 = float(input("Enter a number:"))
which would take user input and converti it to number. i don't know what's the rest of your code, so i might be wrong about that line.