# \#compound-expression

**URL:** https://discourse.julialang.org/tag/compound-expression/1807.md

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## [ERROR: syntax: unexpected semicolon in tuple around REPL](https://discourse.julialang.org/t/error-syntax-unexpected-semicolon-in-tuple-around-repl/129399)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 4\
**Last updated:** [May 28, 2025, 2:22pm UTC](https://discourse.julialang.org/t/error-syntax-unexpected-semicolon-in-tuple-around-repl/129399 "2025-05-28T14:22:48Z")

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Why can’t I write this compound expression? (The context is a Givens rotation) julia\> A = rand(-9:9, 2, 2) 2×2 Matrix{Int64}: -9 -9 -1 1 julia\> t = pi/3 1.0471975511965976 julia\> c, s = cos(t), sin(t); \[c s; -s c…