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Task/Loops-For/EDSAC-order-code/loops-for.edsac

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+[ Loops
+  =====
+
+  A program for the EDSAC
+
+  Demonstrates nested loops
+  and printer output
+
+  Works with Initial Orders 2 ]
+
+
+
+        T56K  [ set load point  ]
+        GK    [ set theta       ]
+
+        O21@  [ figure shift    ]
+
+[  1 ]  T24@  [ a = 0           ]
+        A19@  [ a = i           ]
+
+[  3 ]  T20@  [ j = a; a = 0    ]
+        O22@  [ write character ]
+        A20@  [ a = j           ]
+        S17@  [ a -= 1          ]
+        U20@  [ j = a           ]
+        E3@   [ if a>=0 go to 3 ]
+
+        O23@  [ write line feed ]
+        T24@  [ a = 0           ]
+        A19@  [ a = i           ]
+        A17@  [ a += 1          ]
+        U19@  [ i = a           ]
+        S18@  [ a -= 5          ]
+        G1@   [ if a<0 go to 1  ]
+
+        ZF    [ halt            ]
+
+[ 17 ]  P0D   [ const: 1        ]
+[ 18 ]  P2D   [ const: 5        ]
+
+[ 19 ]  P0F   [ var: i          ]
+[ 20 ]  P0F   [ var: j          ]
+
+[ 21 ]  #F    [ figure shift    ]
+[ 22 ]  ZF    [ '+' character   ]
+[ 23 ]  &F    [ line feed       ]
+
+[ 24 ]  P0F   [ used to clear a ]
+
+        EZPF  [ begin execution ]