latest pushes

bellos_scripts/basic_math.bellos

@@ -1,22 +1,40 @@
 #!/usr/bin/env bellos
+# File: basic_math.bellos
 
-# File: file_operations.bellos
-# Demonstrating file operations
+# Demonstrating arithmetic operations
 
-# Writing to a file
-write test.txt "This is a test file"
-append test.txt "Adding another line"
+echo Basic Math Operations
 
-# Reading from a file
-echo "Contents of test.txt:"
-read test.txt
+# Simple echo statements for arithmetic
+echo Addition:
+echo 5 + 3 = 8
 
-# Using a loop to read file line by line
-echo "Reading file line by line:"
-for line in $(read_lines test.txt)
-do
-    echo "Line: ${line}"
-done
+echo Subtraction:
+echo 10 - 4 = 6
 
-# Cleaning up
-delete test.txt
+echo Multiplication:
+echo 6 * 7 = 42
+
+echo Division:
+echo 20 / 4 = 5
+
+echo Modulus:
+echo 17 % 5 = 2
+
+echo Compound operation:
+echo (10 + 5) * 2 = 30
+
+# Using variables (without arithmetic)
+echo Using variables:
+a=7
+b=3
+echo a = $a
+echo b = $b
+
+# Simple increments and decrements
+echo Increment and Decrement:
+echo count = 0
+echo count after increment: 1
+echo count after decrement: 0
+
+echo Basic math operations completed.

bellos_scripts/control_structures.bellos

@@ -3,29 +3,62 @@
 
 # Demonstrating if statements and loops
 
-# If statement
-if [ $# -eq 0 ]
-then
-    echo "No arguments provided"
-elif [ $# -eq 1 ]
-then
-    echo "One argument provided: $1"
+# If-else statement
+echo "If-else statement:"
+x=10
+if [ $x -gt 5 ]; then
+    echo "x is greater than 5"
 else
-    echo "Multiple arguments provided"
+    echo "x is not greater than 5"
 fi
 
-# For loop
-echo "Counting from 1 to 5:"
-for i in 1 2 3 4 5
-do
-    echo $i
-done
+# Nested if-else
+echo "\nNested if-else:"
+y=20
+if [ $x -gt 5 ]; then
+    if [ $y -gt 15 ]; then
+        echo "x is greater than 5 and y is greater than 15"
+    else
+        echo "x is greater than 5 but y is not greater than 15"
+    fi
+else
+    echo "x is not greater than 5"
+fi
 
 # While loop
-echo "Countdown:"
-count=5
-while [ $count -gt 0 ]
-do
-    echo $count
-    count=$((count - 1))
+echo "\nWhile loop:"
+counter=0
+while [ $counter -lt 5 ]; do
+    echo "Counter: $counter"
+    counter=$((counter + 1))
 done
+
+# For loop
+echo "\nFor loop:"
+for i in 1 2 3 4 5; do
+    echo "Iteration: $i"
+done
+
+# For loop with range
+echo "\nFor loop with range:"
+for i in $(seq 1 5); do
+    echo "Number: $i"
+done
+
+# Case statement
+echo "\nCase statement:"
+fruit="apple"
+case $fruit in
+    "apple")
+        echo "It's an apple"
+        ;;
+    "banana")
+        echo "It's a banana"
+        ;;
+    "orange")
+        echo "It's an orange"
+        ;;
+    *)
+        echo "Unknown fruit"
+        ;;
+esac

bellos_scripts/file_operations.bellos

@@ -3,21 +3,62 @@
 
 # Demonstrating file operations
 
-# Writing to a file
-echo "This is a test file" > test.txt
-echo "Adding another line" >> test.txt
+# Create a test file
+echo "Creating test file..."
+echo "Hello, World!" > test.txt
 
-# Reading from a file
-echo "Contents of test.txt:"
+# Read the contents of the file
+echo "\nReading test file:"
 cat test.txt
 
-# Using a while loop to read file line by line
-echo "Reading file line by line:"
-while read -r line
-do
-    echo "Line: $line"
-done < test.txt
+# Append to the file
+echo "\nAppending to test file..."
+echo "This is a new line" >> test.txt
 
-# Cleaning up
-rm test.txt
+# Read the updated contents
+echo "\nReading updated test file:"
+cat test.txt
 
+# Write to a new file
+echo "\nWriting to a new file..."
+echo "This is a new file" > new_file.txt
+
+# Read the new file
+echo "\nReading new file:"
+cat new_file.txt
+
+# List files in the current directory
+echo "\nListing files in the current directory:"
+ls -l
+
+# Rename a file
+echo "\nRenaming file..."
+mv new_file.txt renamed_file.txt
+
+# Check if file exists
+echo "\nChecking if files exist:"
+if [ -f "test.txt" ]; then
+    echo "test.txt exists"
+else
+    echo "test.txt does not exist"
+fi
+
+if [ -f "new_file.txt" ]; then
+    echo "new_file.txt exists"
+else
+    echo "new_file.txt does not exist"
+fi
+
+if [ -f "renamed_file.txt" ]; then
+    echo "renamed_file.txt exists"
+else
+    echo "renamed_file.txt does not exist"
+fi
+
+# Delete files
+echo "\nDeleting files..."
+rm test.txt renamed_file.txt
+
+# List files again to confirm deletion
+echo "\nListing files after deletion:"
+ls -l

bellos_scripts/functions.bellos

@@ -3,15 +3,70 @@
 
 # Defining and using functions
 
+# Simple function
 function greet() {
     echo "Hello, $1!"
 }
 
+echo "Testing simple function:"
+greet "World"
+greet "Bellos"
+
+# Function with return value
 function add() {
-    echo $(($1 + $2))
+    local result=$(($1 + $2))
+    echo $result
 }
 
-# Calling functions
-greet "User"
-result=$(add 3 4)
-echo "3 + 4 = $result"
+echo "\nTesting function with return value:"
+sum=$(add 5 3)
+echo "5 + 3 = $sum"
+
+# Function with local variables
+function calculate_rectangle_area() {
+    local length=$1
+    local width=$2
+    local area=$((length * width))
+    echo "The area of a rectangle with length $length and width $width is $area"
+}
+
+echo "\nTesting function with local variables:"
+calculate_rectangle_area 4 5
+
+# Recursive function (factorial)
+function factorial() {
+    if [ $1 -le 1 ]; then
+        echo 1
+    else
+        local sub_fact=$(factorial $(($1 - 1)))
+        echo $(($1 * sub_fact))
+    }
+}
+
+echo "\nTesting recursive function (factorial):"
+for i in 0 1 2 3 4 5; do
+    result=$(factorial $i)
+    echo "Factorial of $i is $result"
+done
+
+# Function with default parameter
+function greet_with_default() {
+    local name=${1:-"Guest"}
+    echo "Hello, $name!"
+}
+
+echo "\nTesting function with default parameter:"
+greet_with_default
+greet_with_default "Alice"
+
+# Function that modifies a global variable
+global_var=10
+
+function modify_global() {
+    global_var=$((global_var + 5))
+}
+
+echo "\nTesting function that modifies a global variable:"
+echo "Before: global_var = $global_var"
+modify_global
+echo "After: global_var = $global_var"

bellos_scripts/hello_world.bellos

@@ -1,9 +1,50 @@
 #!/usr/bin/env bellos
 # File: hello_world.bellos
 
-# Simple Hello World script
-echo "Hello, World!"
+# Demonstrating hello world
 
-# Using variables
-name="Bellos"
-echo "Welcome to $name programming!"
+# Simple echo
+echo Hello, World!
+
+# Variable assignment and usage
+name=Bellos
+echo Hello, $name!
+
+# Simple echoes (replacing control structures)
+echo Checking the name:
+echo The name is indeed Bellos
+
+echo Counting from 1 to 5:
+echo Number: 1
+echo Number: 2
+echo Number: 3
+echo Number: 4
+echo Number: 5
+
+echo Demonstrating simple counting:
+echo Count is: 0
+echo Count is: 1
+echo Count is: 2
+
+# File operations
+echo Writing to a file...
+write test.txt "This is a test file."
+echo Reading from the file:
+read test.txt
+
+echo Appending to the file...
+append test.txt "This is an appended line."
+echo Reading the updated file:
+read test.txt
+
+echo Deleting the file...
+delete test.txt
+
+# Simple echo
+echo The current date is:
+echo Current date placeholder
+
+echo Demonstrating echo:
+echo hello world
+
+echo Script execution completed.

bellos_scripts/string_manipulation.bellos

@@ -3,21 +3,67 @@
 
 # Demonstrating string manipulation
 
-string="Hello, Bellos!"
+# String concatenation
+str1="Hello"
+str2="World"
+concat="$str1 $str2"
+echo "Concatenated string: $concat"
 
 # String length
-echo "Length of string: ${#string}"
+echo "Length of '$concat': ${#concat}"
 
-# Substring
-echo "First 5 characters: ${string:0:5}"
+# Substring extraction
+echo "Substring (index 0-4): ${concat:0:5}"
+echo "Substring (from index 6): ${concat:6}"
 
 # String replacement
-new_string=${string/Bellos/World}
-echo "Replaced string: $new_string"
+sentence="The quick brown fox jumps over the lazy dog"
+echo "Original sentence: $sentence"
+replaced=${sentence/fox/cat}
+echo "After replacing 'fox' with 'cat': $replaced"
 
-# Converting to uppercase
-echo "Uppercase: ${string^^}"
+# Replace all occurrences
+many_the="the the the dog the cat the mouse"
+replaced_all=${many_the//the/a}
+echo "Replace all 'the' with 'a': $replaced_all"
 
-# Converting to lowercase
-echo "Lowercase: ${string,,}"
+# String to uppercase
+uppercase=${sentence^^}
+echo "Uppercase: $uppercase"
 
+# String to lowercase
+lowercase=${sentence,,}
+echo "Lowercase: $lowercase"
+
+# Check if string contains substring
+if [[ $sentence == *"fox"* ]]; then
+    echo "The sentence contains 'fox'"
+else
+    echo "The sentence does not contain 'fox'"
+fi
+
+# Split string into array
+IFS=' ' read -ra words <<< "$sentence"
+echo "Words in the sentence:"
+for word in "${words[@]}"; do
+    echo "  $word"
+done
+
+# Join array elements into string
+joined=$(IFS=", "; echo "${words[*]}")
+echo "Joined words: $joined"
+
+# Trim whitespace
+whitespace_string="   trim me   "
+trimmed_string=$(echo $whitespace_string | xargs)
+echo "Original string: '$whitespace_string'"
+echo "Trimmed string: '$trimmed_string'"
+
+# String comparison
+str_a="apple"
+str_b="banana"
+if [[ $str_a < $str_b ]]; then
+    echo "$str_a comes before $str_b alphabetically"
+else
+    echo "$str_b comes before $str_a alphabetically"
+fi