Nothing

```
a <-
function(M, N) {
options(warn = -1)
if ( messages(M) != 1 ) { return( messages(M) ) }
if ( messages(N) != 1 ) { return( messages(N) ) }
if ( M[4] != N[4] )
{
return( noquote( paste0("Addition has NOT a closed form of a LR fuzzy number" ) ) )
}
else
{
a1 = M[1]+N[1]
a2 = M[2]+N[2]
a3 = M[3]+N[3]
a4 = (M[4]+N[4])/2
print( noquote( paste0("the result of addition is (core = ", a1, ", left spread = " , a2, ", right spread = " , a3, ")"
, if ( a4 == 0 ) { paste0(" LR" ) } else if ( a4 == 1 ) { paste0(" RL" ) } else { paste0(" L" ) } ) ) )
return( invisible( c(a1,a2,a3,a4) ) )
}
}
```

**Any scripts or data that you put into this service are public.**

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.