Get exponential complex from a reel variable

I want to get this complexe variable : exp(-1j*wk*M) where wk*M=6.2714e+09

and I have : exp(-1j*wk*iM)

ans = 1.0000 - 0.0000i

but when I do : exp(-1j*6.2714e+09) :

ans = 0.7843 - 0.6204i

Why do I get wrong result when I use the variable instead of its value in the ?

Thanks a lot!

[Nikhil Sapre]

Hi AC,

I tested in R2020b and R2021a and I see the same results.

What version of MATLAB are you using?

Answer 1

[Walter Roberson]

and I have : exp(-1j*wk*iM) 

Your variable is named M not iM . You might have an iM variable hanging around that has value 0.