new files

Task/Binary-search/Tcl/binary-search-1.tcl

@@ -0,0 +1,25 @@
+proc binSrch {lst x} {
+    set len [llength $lst]
+    if {$len == 0} {
+        return -1
+    } else {
+        set pivotIndex [expr {$len / 2}]
+        set pivotValue [lindex $lst $pivotIndex]
+        if {$pivotValue == $x} {
+            return $pivotIndex
+        } elseif {$pivotValue < $x} {
+            set recursive [binSrch [lrange $lst $pivotIndex+1 end] $x]
+            return [expr {$recursive > -1 ? $recursive + $pivotIndex + 1 : -1}]
+        } elseif {$pivotValue > $x} {
+            set recursive [binSrch [lrange $lst 0 $pivotIndex-1] $x]
+            return [expr {$recursive > -1 ? $recursive : -1}]
+        }
+    }
+}
+proc binary_search {lst x} {
+    if {[set idx [binSrch $lst $x]] == -1} {
+        puts "element $x not found in list"
+    } else {
+        puts "element $x found at index $idx"
+    }
+}

Task/Binary-search/Tcl/binary-search-2.tcl

@@ -0,0 +1,8 @@
+proc binarySearch {lst x} {
+    set idx [lsearch -sorted -exact $lst $x]
+    if {$idx == -1} {
+        puts "element $x not found in list"
+    } else {
+        puts "element $x found at index $idx"
+    }
+}