Answer: TCL (Tool Command Language) scripting is a scripting language commonly used for automating tasks, developing applications, and writing test scripts.
Answer: Code can be commented out in TCL using the '#' symbol at the beginning of the line.
Answer: Variables in TCL are declared using the 'set' command. For example, "set variable_name value".
Answer: The command-line arguments in TCL can be accessed using the 'argv' variable.
Answer: The 'expr' command is used for evaluating arithmetic expressions in TCL.
Answer: Strings can be concatenated in TCL using the 'concat' command or the '+' operator.
Answer: User input can be read using the 'gets' command in TCL.
Answer: The 'if' statement in TCL is used for conditional execution of code based on a specific condition.
Answer: The 'foreach' command is used to iterate over a list in TCL.
Answer: The 'for' loop is used for iterating a specified number of times, whereas the 'foreach' loop is used for iterating over a list.
Answer: Procedures in TCL can be defined using the 'proc' command and called using the procedure name followed by arguments.
Answer: Errors and exceptions can be handled using the 'catch' command in TCL.
Answer: The 'regexp' command is used for pattern matching and string manipulation in TCL.
Answer: The 'puts' command can be used to redirect the output of a command to a file in TCL.
Answer: The 'incr' command is used to increment the value of a variable in TCL.
Answer: The 'open' command is used to open a file for reading or writing, and the 'read' and 'write' commands are used for file operations.
Answer: The 'exec' command is used for executing external commands or scripts from within TCL.
Answer: The 'string length' command is used to access the length of a string, while the 'llength' command is used for the length of a list.
Answer: The 'clock' command is used for performing operations related to time and date in TCL.
Answer: Signals can be handled using the 'signal' command in TCL.
Answer: The 'string compare' command is used for comparing strings in TCL.
Answer: TCL scripts can be executed in interactive mode by running the 'tclsh' command and providing the script file as an argument.
Answer: A 'list' is an ordered collection of elements, whereas an 'array' is an associative collection with key-value pairs.
Answer: Conditional evaluation of an expression can be done using the 'expr' command with the '?:' ternary operator.
Answer: The 'after' command is used for scheduling delayed execution of commands or scripts in TCL.