I am trying to execute this simple lines of code, but keep getting an undef error, although I explicitly define my variable to be global.
global t = 1;
for i in 1:10
t+=0.1;print(“\ni=”,i,“, t=”,t);
end
This gives
ERROR: UndefVarError: t not defined
I am using Julia 1.1.0. Can you help me understand what I am doing wrong.
You need global t += 0.1
in the loop to modify a global.
jbrea
April 3, 2019, 7:01pm
3
The keyword global
is at the wrong place.
t = 1;
for i in 1:100
global t += 0.1
@show t i
end
2 Likes
If you are an introductory user, then I suggest for now either (1) using Jupyter for exploration, as it is more intuitive; or (2) wrap code with loops in functions if working in the console or top level scripts.
1 Like
Or just use the global
keyword if you want to modify a global variable from inside a loop, function or other scope block.
11 Likes
Thanks. I will reread the manual and try to understand why this works.
Thanks. I will try to get Jupyter.
I will reread the manual and try to understand why this works. Thanks !
4 posts were split to a new topic: Installing IJulia