Added text functions

1 files changed, 18 insertions, 1 deletions

diff --git a/readme.rst b/readme.rst
index f37c17f..5d213c2 100755
--- a/readme.rst
+++ b/readme.rst
@@ -4,6 +4,7 @@
 .. default-role:: code
 
 .. contents::
+  :depth: 3
 
 ===========
 Compilation
@@ -192,7 +193,7 @@ Function            Value
 *x* `^` *y*         Compute *x* ^ *y*
 `gcd(` *x*; *y* `)` Greatest common divisor
 `lcm(` *x*; *y* `)` Lowest common multiple
-`rnd()`             A random number between 0 and 1
+`rand()`            A random number between 0 and 1
 `sqrt(Numeric)`     Square root
 `exp(Numeric)`      Exponential
 `ln(Numeric)`       Natural logarithm
@@ -244,3 +245,19 @@ Function              Value
 `atan2(` *x*; *y* `)` Arc tangent of *x* / *y*
 ===================== =====================================
 
+Text
+----
+
+================================= ======================================================
+Function                          Value
+================================= ======================================================
+`trim(Text)`                      Remove all space on left and right
+`upper(Text)`                     Convert the string to uppercase
+`lower(Text)`                     Convert the string to lowercase
+`unicode(Text)`                   Returns the numeric code for the first Unicode character
+`unichar(Numeric)`                Converts a code number into a Unicode character or letter
+`substitute(Text, Text, Text)`    Substitutes new text for old text in a string
+`len(Text)`                       Return the length of a string
+`left(Text, Numeric)`             Return the first n characters
+`right(Text, Numeric)`            Return the last n characters
+================================= ======================================================