what is the meaning of number 1e5?

Question

I have seen in some codes that peaple define a variable and assign values like 1e-8 or 1e5 for example

const int MAXN = 1e5 + 123;

what are these numbers?! I couldnt find any thing on the web...

question from:https://stackoverflow.com/questions/65848643/enumber-meaning-in-pandas

Answer 1

1e5 is a number expressed using scientific notation and it means 10 to the 5th power (the e meaning 'exponent')

so 1e5 is equal to 100000, both notations are interchangeably meaning the same.