Validating isExponentialFloat$()$ using only iterations, conditionals and string handling.

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I$\text{'}$M WRITING IN CAPITALS SO YOU READ THIS PROPERLY. THIS IS STILL SAYING THAT $"-12\mathrm{.}33-$e$3"($NOTE $2$ MINUS SYMBOLS$)$ IS NOT AN EXPONENTIAL FLOAT... BUT $"-12\mathrm{.}33-$e$3"($NOTE $2$ MINUS SYMBOLS$)$ IS AN EXPONENTIAL FLOAT. THE PROGRAM IS STILL WRONG.

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This works well but when I enter in the list $"-12\mathrm{.}33$e$-3"($a minus number with a minus exponential$)$ it says "This number is not an Exponential Float" BUT IT IS$.$ The minus symbol was simply removed from the last solution which does not make the code right. I have added $"-12\mathrm{.}33$e$-3","12\mathrm{.}33$e$-3"$ to the test solutions $-$ "This number is an Exponential Float". both need to be recognised as Please fix this.

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This is a re$-$do of a previously asked answer except that this needs to be answered using only iterations, conditionals and string handling. i$.$e$.$ if$,$ elif and else $($not 'pattern' and 'return'$)$

How do I write a python function isExponentialFloat$()$ that returns true if a number is in correct exponential format i$.$e$.2\mathrm{.}4$e$3,-3\mathrm{.}21$e$2$ or $-12\mathrm{.}33$e$-3$ and returns false for any other format.

Need to use both of these in determining if a $=...$

$1.$

isDigPeriod$()$ to determine if number has digits and periods only... followed by

a $=$ isInt$("$$$3")$

resulting in a getting a false

$2.$

isInt$()$ to determine if number is an intereg with $($can include negative, zero or poositive$)$

a $=$ isInt$("-58")$

resulting in a getting a true

FOLLOWED BY$...$

# Test the functions

inputs $=["2\mathrm{.}4$e$3","3\mathrm{.}21$e$2","-12\mathrm{.}33$e$-3","12\mathrm{.}33$e$-3","$$$3","-58","3\mathrm{.}7$e$5"]$

If true for both prints "This number is an ExponentialFloat" or if either or both are false prints "This number is not an ExponentialFloat".

# Good output style

for num in inputs:

if isExponentialFloat$($num$)$:

print$($f$"\{$num$\}$: This number is an ExponentialFloat"$)$

else:

print$($f$"\{$num$\}$: This number is not an ExponentialFloat"$)$