CobolJS Lab

Program Studio

Write COBOL, inspect the parser state, and execute against browser-side virtual files.

Loaded Example

Concepts

Breakpoints Pause before executing these source lines. Input Queue One value per line, consumed by ACCEPT.

COBOL DISPLAY output is echoed here and to the console.

Runtime status, current statement, and breakpoint-aware execution state.

Recent statements executed by the interpreter.

Working storage, file record state, file modes, and remaining input.

JSON object keyed by logical file name or assigned filename.