concatenate a collection of strings 

Tcl Library Procedures


#include <tcl.h>

char * Tcl_Concat(argc, argv)


int argc (in) 

Number of strings.

char *argv[] (in) 

Array of strings to concatenate. Must have argc entries.


Tcl_Concat() is a utility procedure used by several of the Tcl commands. Given a collection of strings, it concatenates them together into a single string, with the original strings separated by spaces. This procedure behaves differently than Tcl_Merge(), in that the arguments are simply concatenated: no effort is made to ensure proper list structure. However, in most common usage the arguments will all be proper lists themselves; if this is true, then the result will also have proper list structure.

Tcl_Concat() eliminates leading and trailing white space as it copies strings from argv to the result. If an element of argv consists of nothing but white space, then that string is ignored entirely. This white-space removal was added to make the output of the concat command cleaner-looking.

The result string is dynamically allocated using Tcl_Alloc(); the caller must eventually release the space by calling Tcl_Free().


Windows 8.1. Windows Server 2012 R2. Windows 10. Windows Server 2016. Windows Server 2019. Windows 11. Windows Server 2022.


PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition



PTC MKS Toolkit 10.4 Documentation Build 39.