initial musings

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+# `if` macro, think of it as a statement I guess?
+# else is used by the `if` command in C, presumably?
+if {< i 10} {
+	println "a"
+} {< i 20} {
+	println "b"
+} else {
+	println "c"
+}
+
+# `if` procedure, think of it as expr-if in other languages I guess
+# note that all arguments get evaluated here, so if you have a slow function in
+# one branch you should probably prefer `if` statements
+
+let x (do-if (< i 10) "a" (< i 20) "b" else "c")