expr

Evaluate expressions and manipulate strings. More information: <https://www.gnu.org/software/coreutils/expr>.

Install

All systems
curl cmd.cat/expr.sh
Debian Debian
apt-get install coreutils
Ubuntu
apt-get install coreutils
Alpine
apk add coreutils
Arch Arch Linux
pacman -S coreutils
image/svg+xml Kali Linux
apt-get install coreutils
CentOS
yum install coreutils
Fedora
dnf install coreutils
Windows (WSL2)
sudo apt-get update sudo apt-get install coreutils
OS X
brew install coreutils
Raspbian
apt-get install coreutils
Dockerfile
dockerfile.run/expr
Docker
docker run cmd.cat/expr expr powered by Commando

Evaluate expressions and manipulate strings. More information: <https://www.gnu.org/software/coreutils/expr>.

  • Get the length of a specific string:
    expr length "string"
  • Get the substring of a string with a specific length:
    expr substr "string" from length
  • Match a specific substring against an anchored pattern:
    expr match "string" 'pattern'
  • Get the first char position from a specific set in a string:
    expr index "string" "chars"
  • Calculate a specific mathematic expression:
    expr expression1 +|-|*|/|% expression2
  • Get the first expression if its value is non-zero and not null otherwise get the second one:
    expr expression1 \| expression2
  • Get the first expression if both expressions are non-zero and not null otherwise get zero:
    expr expression1 \& expression2

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