how to create a complex number: j(number)

i want create complex number in my m file code how i can do this : a= j(number)

[Jiro Doke]

Changing the title to make it more descriptive.

Answer 1

[Walter Roberson]

a = 3 + 5j;

or

a = 3 + 5*j;

or

a = complex(3,5);

Answer 2

[behnam]

for example :

a=input('enter a');
t=j(a/20);

this is true ?

or t=i(a/20);

[Matt Kindig]

Neither is correct. Both j and i are constants (sqrt(-1)), not functions, so that are not called like this. Instead:

a=input('enter a');

t=j*(a/20)