Template:Evaldemo

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Examples:

1. {{Evaldemo|CURRENTDAY|s=is}} displays

   {{ CURRENTDAY }} is 4

2. {{Evaldemo|#expr:2*3}} displays

   {{ #expr:2*3 }} gives 6

3. {{subst:evaldemo|subst=subst:|#expr:2*3}} gives:

   {{ subst:#expr:2*3}} gives 6

4. {{Evaldemo|1=#expr:2+2=5}} displays

   {{ #expr:2+2=5 }} gives 0

5. {{Evaldemo|1=#expr:(2+2=4)|s==}} displays

   {{ #expr:(2+2=4) }} = 1

6. {{Evaldemo|urlencode:!|s==}} displays

   {{ urlencode:! }} = %21

7. {{Evaldemo|uc:abc}} gives

   {{ uc:abc }} gives ABC

8. {{subst:Evaldemo|uc:Upper Case|subst=subst:}} substitutes

   {{ subst:uc:Upper Case}} gives UPPER CASE

   See Help:Substitution for several caveats wrt subst=subst:.

As always the expression (first parameter) cannot directly contain "|", "=", plus other special cases related to square brackets / curly braces. In the case of this template "not directly" means "never" except from "=" as shown above.

For simple nested expressions use Template:Xpdn (edit talk links history).