Sample program
set name [gets stdin]
puts "Hello $name"
- set : To set data to a variable
- gets stdin : to read input data from Console
- puts : prints data to the console.
# : Single line comment
Variables
set name onecompiler
Operators
| Operator type | Description |
|---|
| Arithmetic Operator | + , - , * , / , % |
| comparision Operator | < , > , <= , >=, != , == |
| Bitwise Operator | & , ^ , |, <<, >> |
| Logical Operator | && , ||, ! |
| Ternary Operator | ? : |
Conditional Statements
1. If-Else
if(conditional-expression) {
#code
} else {
#code
}
2. Switch
switch(conditional-expression) {
value1 {
# code
}
value1 {
# code
}
...
default {
# code
}
Loops
1. For
for{start}{test}{next}{
# code
}
2. While
while(condition) {
# code
}
Arrays
set ArrayName(Index) value
Lists
set listName { i1 i2 i3 .. in }
# or
set listName [list i1 i2 i3]
# or
set listName [split "items which separated by a character" split_character]
Dictionary
Dictionary is a collection of key-value pairs.
dict set dictName key value
# or
dict create dictName key1 value1 key2 value2 .. keyn valuen
Procedures
proc procedureName {arguments} {
# code
}
File Handling
Opening a file
open fileName Mode
| Mode | Description |
|---|
| "r" | Read-only(default mode) |
| "r+" | Read-write, File must be present already. |
| "w" | Write-only |
| "w+" | Read-write, creates new file if file doesn't exist |
| "a" | Write-only, appends data at the end of file if file exists else creates a new file |
| "a+" | Read-write, read data from beginning but appends data at the end of file if file exists else creates a new file |
Closing a file
close fileName
Writing to a file
puts $filename "data to write to the file"