System of differenital equations with odesolve

[Sabaism]

Dear community,

I want to solve a system of differential equations numerically by using the odesolve command.
I think it should be possible, but I am not able to figure out the correct syntax to do so.
By searching the web I have found the following example:

Code:


DE1:=diff(y1(x),x)=y2(x)
DE2:=diff(y2(x),x)=-y1(x)

IC1:=y1(0)=1
IC2:=y2(0)=0

odesolve({DE1,DE2},{y1(x),y2(x)},{IC1,IC2},x)

However, I know the {} cannot be correct, so I replaced them with [], but it does not work either.
Could somebody please give me a hint to solve this.

Thank you in advance.
Best wishes,
Jo