What is the meaning of number 1e5?
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.
1e5 means 1 × 105.
Similarly, 12.34e-9 means 12.34 × 10−9.
Generally, AeB means A × 10B.
this is scientific notation for 10^5 = 100000