expr

expr is a command line utility on Unix and Unix-like operating systems which evaluates an expression and outputs the corresponding value. It first appeared in Unix v7. The command... Wikipedia

• Original author(s):  Dick Haight, (AT&T Bell Laboratories)
• Developer(s):  Various open-source and commercial developers
• Initial release:  1979
• Operating system:  Unix, Unix-like, IBM i
• Platform:  Cross-platform
• Type:  Command
• Data source:  DuckDuckGo