CS 421

Fall 2026 All Classes

All Classes

Programming Languages & Compilers

Credit: 3 OR 4 hours.

Structure of programming languages and their implementation. Basic language design principles; abstract data types; functional languages; type systems; object-oriented languages. Basics of lexing, parsing, syntax-directed translation, semantic analysis, and code generation.

3 undergraduate hours. 3 or 4 graduate hours. Prerequisite: One of CS 233, CS 240, CS 340 or ECE 391; CS 374 or ECE 374; one of MATH 225, MATH 257, MATH 415, MATH 416, ASRM 406, or BIOE 210.

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CS 421 class schedule data for fall 2026
CRN	Type	Section	Time	Day	Location	Instructor	Section Details
72203	Discussion/ Recitation Online	CSP CSP	ARRANGED ARRANGED	n.a. n.a.	ARR Illini Center n.a.	Gunter, E Gunter, E	Availability: CrossListOpen (Restricted) Part of Term: 1 Date Range: 08/24/26-12/09/26 Credit: 3 hours Section Info: This section is intended for Chicago City Scholars only. There may be online and in person components. You are responsible for completing homeworks, quizzes, and any in person activities that are required. Please speak with your professor regarding expectations. Weekly in-person meeting in Classroom A at 200 S. Wacker Dr. Chicago. Restriction(s): Restricted to Undergrad - Urbana-Champaign. Restricted to O/C Engineering City Scholars students.
40087	Lecture-Discussion	DG	3:30PM -4:45PM	TR	0027/1025 Campus Instructional Facility	Gunter, E	Availability: CrossListOpen (Restricted) Part of Term: 1 Date Range: 08/24/26-12/09/26 Section Info: For up-to-date information about CS course restrictions, please see the following link: http://go.cs.illinois.edu/csregister Restriction(s): Restricted to Computer Science or Bioinformatics major(s). Restricted to Graduate - Urbana-Champaign. Not intended for MCS:Computer Sci Online -UIUC, MCS: Computer Sci OFF - UIUC, MCS:Computer Sci Online -UIUC, or NDEG:Computer Science Onl-UIUC. Not intended for First Time Freshman students.
30128	Lecture-Discussion	DU	3:30PM -4:45PM	TR	0027/1025 Campus Instructional Facility	Gunter, E	Availability: CrossListOpen (Restricted) Part of Term: 1 Date Range: 08/24/26-12/09/26 Credit: 3 hours Section Info: For up-to-date information about CS course restrictions, please see the following link: http://go.cs.illinois.edu/CSregister Restriction(s): Restricted to Undergrad - Urbana-Champaign.
79365	Discussion/ Recitation Online Lecture	MC3 MC3	ARRANGED ARRANGED	n.a. n.a.	ARR Illini Center n.a.	Gunter, E Gunter, E	Availability: CrossListOpen (Restricted) Part of Term: 1 Date Range: 08/24/26-12/09/26 Credit: 3 hours Section Info: This section is intended for Chicago MCS only. There may be online and in person components. You are responsible for completing homeworks, quizzes, and any in person activities that are required. Please speak with your professor regarding expectations. Weekly in-person meeting in Classroom A at 200 S. Wacker Dr. Chicago Restriction(s): Restricted to Graduate - Urbana-Champaign. Restricted to MCS: Computer Sci OFF - UIUC.
79366	Lecture-Discussion Online Lecture	MC4 MC4	ARRANGED ARRANGED	n.a. n.a.	ARR Illini Center n.a.	Gunter, E Gunter, E	Availability: CrossListOpen (Restricted) Part of Term: 1 Date Range: 08/24/26-12/09/26 Credit: 4 hours Section Info: This section is intended for Chicago MCS only. There may be online and in person components. You are responsible for completing homeworks, quizzes, and any in person activities that are required. Please speak with your professor regarding expectations. Weekly in-person meeting in Classroom A at 200 S. Wacker Dr. Chicago. Restriction(s): Restricted to Graduate - Urbana-Champaign. Restricted to MCS: Computer Sci OFF - UIUC. Not intended for First Time Freshman students.