From: Jason Self <j@jxself.org>
Date: Sun, 2 Jun 2019 15:50:58 +0000 (-0700)
Subject: Add Flow control
X-Git-Url: https://jxself.org/git/?p=inform-resources.git;a=commitdiff_plain;h=472e9f763a76762a6d91644de9b30b0f7b23825c

Add Flow control
---

diff --git a/informqr/informqr.md b/informqr/informqr.md
index e12df8e..0dee485 100644
--- a/informqr/informqr.md
+++ b/informqr/informqr.md
@@ -359,4 +359,32 @@ or an explicit return statement:
 To define a dummy standalone routine with N local variables (unless it
 already exists):
 
-    Stub routine N;
\ No newline at end of file
+    Stub routine N;
+
+Flow control
+------------
+
+To execute statements if *expr* is true; optionally, to execute other
+statements if *expr* is false:
+
+    if (expr)
+        statement_block
+    if (expr)
+        statement_block
+    else
+        statement_block
+
+To execute statements depending on the value of *expr*:
+
+    switch (expr) {
+        value: statement; ... statement;
+        value: statement; ... statement;
+        ...
+        default: statement; ... statement;
+        }
+
+where each *value* can be given as:
+
+    constant
+    lo_constant to hi_constant
+    constant,constant, ... constant
\ No newline at end of file