diff --git a/stdlib/arith.go b/stdlib/arith.go
index a9051eb..5682177 100644
--- a/stdlib/arith.go
+++ b/stdlib/arith.go
@@ -29,6 +29,10 @@ import (
 // perhaps we simply write out arithmetic routines that operate on the strings
 // then we need not worry about storage length.
 
+/* Cast a string to a number
+ * Takes 1 argument
+ * returns nil if fails
+ */
 func num_cast(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     in = in.Eval(f, a, false)
     if in.Tag != ast.STRING {
@@ -50,6 +54,10 @@ func num_cast(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     return out
 }
 
+/* adds N number arguments
+ * takes N arguments
+ * returns the sum, or nil if improper arguments were given
+ */
 func add(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     var res float64
 
@@ -92,6 +100,9 @@ func add(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     return t
 }
 
+/* subtract N args from the final arg
+ * takes N args, returns nil if improper args given
+ */
 func sub(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     var res float64
     var sub float64
@@ -142,6 +153,9 @@ func sub(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     return t
 }
 
+/* multiplies N arguments
+ * returns nil if an improper argument is given
+ */
 func mult(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     res := 1.0
 
@@ -184,6 +198,10 @@ func mult(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     return t
 }
 
+/* divide N arguments
+ * the first argument is divided by each subsequent argument in order
+ * returns nil if an improper argument is given
+ */
 func div(in *ast.Token, a ast.VarTable, f ast.FuncTable) *ast.Token {
     var res float64
 
diff --git a/stdlib/stdlib.go b/stdlib/stdlib.go
index a243700..d92e754 100644
--- a/stdlib/stdlib.go
+++ b/stdlib/stdlib.go
@@ -25,6 +25,9 @@ import (
     "gitlab.com/whom/shs/util"
 )
 
+/* Makes a FuncTable from all functions in the stdlib
+ * add your function here if you are extending the standard library
+ */
 func GenFuncTable() ast.FuncTable {
     var stdlib ast.FuncTable
     stdlib = &map[string]*ast.Function{