I'm new to python, sorry if this seems awfully rudimentary for some. I know complex numbers can be simply represented using j after an integer e.g.
a = 2 + 5j
However when I try something like the code below, python returns an error and doesn't recognise this as being complex?
x = 5
a = 2 + xj
Similarly this doesn't work:
a = 2 + x*j
How can I get around this problem. I'm trying to use this principle is some larger bit of code.
The j is like the decimal point or the e in floating point exponent notation: It's part of the notation for the number literal itself, not some operator you can tack on like a minus sign.
If you want to multiply x by 1j, you have to use the multiplication operator. That's x * 1j.
The j by itself is an identifier like x is. It's not number notation if it doesn't start with a dot or digit. But you could assign it a value, like j = 1j, and then x * j would make sense and work.
Similarly, xj is not implicit multiplication of x and j, but a separate identifier word spelled with two characters. You can use it as a variable name and assign it a separate value, just like the names x, j and foo.
Use the complex() constructor:
Code:
x = 5
a = complex(2, x)
print(a)
Output:
(2+5j)
a = 2 + x*1jor use cmath