visual studio code isn't noticing environment variables

Question

I am using C and C# in vscode, but cant seem to execute them. recently. when I tried to execute a C program, this came up:

gcc : The term 'gcc' is not recognized as the name of a cmdlet, function, script file, or 
operable program. Check the spelling of the name, or if a path was included, verify that the 
path is correct and try again.
At line:1 char:61
+ ...  "d:\codin\C_yes_they_are_different\scripts\" ; if ($?) { gcc test.c  ...
+                                                               ~~~
    + CategoryInfo          : ObjectNotFound: (gcc:String) [], CommandNotFoundException        
    + FullyQualifiedErrorId : CommandNotFoundException

when the following command is run:

cd "d:\codin\C_yes_they_are_different\scripts\" ; if ($?) { gcc test.c -o test } ; if ($?) { .\test }

for this program:

#include <stdio.h>

int main()
{
    printf ("hello world");
    return 0;
}

I followed this tutorial https://www.youtube.com/watch?v=0HD0pqVtsmw&t and I did setup the envirinment variables, yet this happens. and I need help. environment variables