New programming language idea: REvamped SHell, resh. Enjoy the best of both shell script and high level programming languages.

gistfile1.txt

#!/bin/resh

# This is a Unix shell, what's fun about it?
HELLO='Hello,'
CURRENT_VERSION=4

# But here's a twist
# I know you hate C++ style lambda capture
resh [&] {
    // But now you code in a high level scripting language
    HELLO += ' World!';

    // Now you do all the math inside
    // Note: type coercion happens :P
    CURRENT_VERSION = CURRENT_VERSION ** 4;

    // Modify the stuff in outside world, with beloved string interpolation
    let export FILENAME = "${HELLO}_${CURRENT_VERSION}";
}

// Enjoy the best of both worlds...?
curl -o $FILENAME https://example.com/