add range documentation

docs/src/en/mfululizo.md

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+---
+title: Range Function (mfululizo)
+titleTemplate: Range funtion to generate a sequence of numbers.
+---
+
+## Range Function (mfululizo)
+
+The `mfululizo` function generates a sequence of numbers. It can be used in loops or to create arrays of sequential numbers.
+
+### Syntax
+
+```go
+mfululizo(end)
+mfululizo(start, end)
+mfululizo(start, end, step)
+```
+
+### Parameters
+
+- `end`: The upper limit of the sequence (exclusive).
+- `start` (optional): The starting value of the sequence. Default is 0.
+- `step` (optional): The increment between each number in the sequence. Default is 1.
+
+### Return Value
+
+Returns an array of integers.
+
+### Examples
+
+```go
+// Generate numbers from 0 to 4
+kwa i katika mfululizo(5) {
+    andika(i)
+}
+// Output: 0 1 2 3 4
+
+// Generate numbers from 1 to 9
+kwa i katika mfululizo(1, 10) {
+    andika(i)
+}
+// Output: 1 2 3 4 5 6 7 8 9
+
+// Generate even numbers from 0 to 8
+kwa i katika mfululizo(0, 10, 2) {
+    andika(i)
+}
+// Output: 0 2 4 6 8
+
+// Generate numbers in reverse order
+kwa i katika mfululizo(10, 0, -1) {
+    andika(i)
+}
+// Output: 10 9 8 7 6 5 4 3 2 1
+```
+
+### Notes
+
+- The `end` value is exclusive, meaning the sequence will stop before reaching this value.
+- If a negative `step` is provided, `start` should be greater than `end`.
+- The `step` value cannot be zero.

docs/src/mfululizo.md

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+---
+title: Mfululizo
+titleTemplate: Kitendakazi cha mfululizo kuzalisha mlolongo wa nambari.
+---
+
+## Kitendakazi cha Mfululizo
+
+Kitendakazi cha `mfululizo` hutoa mfululizo wa nambari, sawa na kitendakazi cha `range()` cha Python. Kinaweza kutumika katika vitanzi au kuunda safu za nambari zinazofuatana.
+
+### Muundo
+
+```go
+mfululizo(mwisho)
+mfululizo(mwanzo, mwisho)
+mfululizo(mwanzo, mwisho, hatua)
+```
+
+### Vipengele
+
+- `mwisho`: Kikomo cha juu cha mfululizo (haijumuishwi).
+- `mwanzo` (si lazima): Thamani ya kuanzia ya mfululizo. Chaguo-msingi ni 0.
+- `hatua` (si lazima): Ongezeko kati ya kila nambari katika mfululizo. Chaguo-msingi ni 1.
+
+### Thamani Inayorudishwa
+
+Hurudisha safu ya nambari kamili.
+
+### Mifano
+
+```go
+// Toa nambari kutoka 0 hadi 4
+kwa i katika mfululizo(5) {
+    andika(i)
+}
+// Tokeo: 0 1 2 3 4
+
+// Toa nambari kutoka 1 hadi 9
+kwa i katika mfululizo(1, 10) {
+    andika(i)
+}
+// Tokeo: 1 2 3 4 5 6 7 8 9
+
+// Toa nambari shufwa kutoka 0 hadi 8
+kwa i katika mfululizo(0, 10, 2) {
+    andika(i)
+}
+// Tokeo: 0 2 4 6 8
+
+// Toa nambari kwa mpangilio wa kurudi nyuma
+kwa i katika mfululizo(10, 0, -1) {
+    andika(i)
+}
+// Tokeo: 10 9 8 7 6 5 4 3 2 1
+```
+
+### Vidokezo
+
+- Thamani ya `mwisho` haijumuishwi, ikimaanisha mfululizo utasimama kabla ya kufikia thamani hii.
+- Ikiwa `hatua` hasi imetolewa, `mwanzo` inapaswa kuwa kubwa kuliko `mwisho`.
+- Thamani ya `hatua` haiwezi kuwa sifuri.