How to use the constant e?

So the question is given x =0.2 calculate (x^2) *e^4. I know for pi you just type pi which is just pi in the command. But how do I type e in the command window. Also how to use exponents? Do you just go (x^2) ? Do I need those brackets?

[Kenneth Gabriel]

sweet thx

[James Tursa]

If Star's answer met your needs, please formally Accept it.

[Xingyu Xia]

exp()=e^

[Abdalla]

x1 = 𝑒𝑗8𝜋/7

[Voss]

x1 = exp(1j*8*pi/7)

x1 = -0.9010 - 0.4339i

[Jeeimy]

Y=e^(1.2*t)

[DGM]

Use exp(). It's the same answer that's already been demonstrated several times on this page.

[Neliswa]

when i am using this normal e the code does not work mos, what should i do?

[Stephen23]

"when i am using this normal e the code does not work mos, what should i do?"

https://www.mathworks.com/matlabcentral/answers/302984-how-to-use-the-constant-e#answer_234664

Answer 1

[Star Strider]

Use the exponential function exp(y) to compute e^y. For example: 

x = 0.2;  
Result = (x^2)*exp(4)  

Result = 

     2.1839 

Answer 2

[Harsh]

e=exp

then use bracket

i.e. e^5=exp(5) in matlab

Answer 3

[Cai Walsh]

say i needed Vout = VS (1 − e^-T/RC) , how would i write this as ive tried exp(-T/R*C) but wouldt work as theres a negative

[Steven Lord]

T = 2;
R = 5;
C = 7;
y = exp(-T/R*C)

y = 0.0608

z = exp(-14/5)

z = 0.0608

Or did you want to divide by the product of R and C?

w = exp(-T/(R*C))

w = 0.9445

q = exp(-2/35)

q = 0.9445