Scientific notation not working in python

Question

I am using python version 3.9.5, and trying to use scientific notation using the format method, but it's not working!

I have searched across the web for this, but didn't get anything.

I used the formatting method of format(num, f'.{precision}e') to turn it into scientific notation, and it works for non-decimal numbers, but when I use decimal numbers, it doesn't work:

num = int(10**9) # 1000000000
dec = int(10**-4) # 0.0001

print(format(num, '.5e'))
print(format(dec, '.5e'))

# 1.00000e+09
# 0.00000e+00

As you can see, the second output is meant to be a different result but I got 0.00000e+00

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Can somebody please help me solve this, thanks in advance.

Answer 1

int(x) will always be an integer.

print(int(10**-4))

#output 
0

you need to do:

print(format(float(10**-4), '.5e'))

#output
1.00000e-04