Tcl – If else Statement – Tutorialspoint, Tcl – Nested If Statement – Tutorialspoint, TCL/TK – Tutorialspoint, Tcl – If Statement – Tutorialspoint, The syntax of an ‘if…else if…else’ statement in Tcl language is ? if {boolean_expression 1} { # Executes when the boolean expression 1 is true } elseif {boolean_expression 2} { # Executes when the boolean expression 2 is true } elseif {boolean_expression 3} { # Executes when the boolean expression 3 is true } else { # executes when the none of the above condition is true }, It is always legal in Tcl to nest if-else statements, which means you can use one if or else if statement inside another if or else if statement(s). Syntax The syntax for a nested if statement is as follows ?, Tcl8.6.10/Tk8.6.10 Documentation > Tcl Commands > if Tcl / Tk Applications … The then and else arguments are optional “noise words” to make the command easier to read. There may be any number of elseif clauses, including zero. BodyN may also be omitted as long as else is omitted too.
if, elseif and else in Tcl – Tcl example. NEW SERVER – 11.9.2020…Retiring, March 2020 – sorry, you have missed our final public course. The Coronavirus situation has lead us to suspend public training – which was on the cards anyway, with no plans to resume, If Then Else The if command is the basic conditional command. If an expression is true, then execute one command body; otherwise, execute another command body. The second command body … – Selection from Practical Programming in Tcl & Tk , Third Edition [Book], The syntax of an ‘if’ statement in Tcl language is ?. If the Boolean expression evaluates to true, then the block of code inside the if statement will be executed. If Boolean expression evaluates to false, then the first set of code after the end of the ‘if’ statement (after the closing curly brace) will be executed.
Braces, {}, and parentheses, (), are not interchangeable in Tcl . Formally, braces are (with one exception) a kind of quoting that indicates that no further substitutions are to be performed on the contents.In the first case above, this means that that argument is delivered to if without substitution, which evaluates it as an expression. The expression sub-language has a strongly-analogous …
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