{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-05-26T00:16:20.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2026-05-26T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":2610,"title":"counting for loop","description":"Complete the function below using a for loop to count from 3 to N by 2.  For example, if N is 10, count 3, 5, 7, 9 and stop.  For each value v, call the function mydisplay(v).  Note that N could be less than 3, in which case mydisplay() should never be called.","description_html":"\u003cp\u003eComplete the function below using a for loop to count from 3 to N by 2.  For example, if N is 10, count 3, 5, 7, 9 and stop.  For each value v, call the function mydisplay(v).  Note that N could be less than 3, in which case mydisplay() should never be called.\u003c/p\u003e","function_template":"function [] = counting_loop(N)\r\n  for ???\r\nend\r\n\r\nfunction mydisplay(v)\r\n  global gRV ;\r\n  gRV(end+1) = v ;\r\nend ","test_suite":"%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 10;\r\ngRV_correct = [3 5 7 9];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));\r\n%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 5;\r\ngRV_correct = [3 5];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));\r\n%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 3;\r\ngRV_correct = [3];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));\r\n%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 0;\r\ngRV_correct = [];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));\r\n%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 39;\r\ngRV_correct = [3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":24594,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":62,"test_suite_updated_at":"2014-09-30T07:12:50.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2014-09-29T06:04:35.000Z","updated_at":"2026-05-28T03:35:48.000Z","published_at":"2014-09-30T07:12:50.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eComplete the function below using a for loop to count from 3 to N by 2. For example, if N is 10, count 3, 5, 7, 9 and stop. For each value v, call the function mydisplay(v). Note that N could be less than 3, in which case mydisplay() should never be called.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"problems":[{"id":2610,"title":"counting for loop","description":"Complete the function below using a for loop to count from 3 to N by 2.  For example, if N is 10, count 3, 5, 7, 9 and stop.  For each value v, call the function mydisplay(v).  Note that N could be less than 3, in which case mydisplay() should never be called.","description_html":"\u003cp\u003eComplete the function below using a for loop to count from 3 to N by 2.  For example, if N is 10, count 3, 5, 7, 9 and stop.  For each value v, call the function mydisplay(v).  Note that N could be less than 3, in which case mydisplay() should never be called.\u003c/p\u003e","function_template":"function [] = counting_loop(N)\r\n  for ???\r\nend\r\n\r\nfunction mydisplay(v)\r\n  global gRV ;\r\n  gRV(end+1) = v ;\r\nend ","test_suite":"%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 10;\r\ngRV_correct = [3 5 7 9];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));\r\n%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 5;\r\ngRV_correct = [3 5];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));\r\n%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 3;\r\ngRV_correct = [3];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));\r\n%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 0;\r\ngRV_correct = [];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));\r\n%%\r\nglobal gRV;\r\ngRV = [];\r\nN   = 39;\r\ngRV_correct = [3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39];\r\ncounting_loop(N);\r\ncode = textread('counting_loop.m', '%s');\r\nassert(isequal(gRV, gRV_correct) \u0026\u0026 strcmp(code(5), 'for'));","published":true,"deleted":false,"likes_count":2,"comments_count":0,"created_by":24594,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":62,"test_suite_updated_at":"2014-09-30T07:12:50.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2014-09-29T06:04:35.000Z","updated_at":"2026-05-28T03:35:48.000Z","published_at":"2014-09-30T07:12:50.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eComplete the function below using a for loop to count from 3 to N by 2. For example, if N is 10, count 3, 5, 7, 9 and stop. For each value v, call the function mydisplay(v). Note that N could be less than 3, in which case mydisplay() should never be called.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"errors":[],"facets":[[],[{"value":"medium","count":1,"selected":false}]],"term":"tag:\"counting loop\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}