If I get No data how to move to next flow

Output returns no Data, but next flow HTTP Request node is not working, can anyone helps if data is empty it should run the next node, I tried all but not working

That is what the option “Always Output Data” is for. It can be found underneath “Settings”:
Screenshot from 2022-01-09 16-32-30

But output data is empty how to pass it accordingly if data found then do this else do this

That is possible via the “Is Empty” operation on the IF-Node and setting an expression on it which references the value to check for (in this case it could be literally any value):
Screenshot from 2022-01-09 17-36-00

Value does not exist:


Value exists:

Above example workflow:

{
  "nodes": [
    {
      "parameters": {
        "values": {
          "string": [
            {
              "name": "whatever",
              "value": "asdf"
            }
          ]
        },
        "options": {}
      },
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        460,
        300
      ]
    },
    {
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{$json[\"whatever\"]}}",
              "operation": "isEmpty"
            }
          ]
        }
      },
      "name": "IF",
      "type": "n8n-nodes-base.if",
      "typeVersion": 1,
      "position": [
        680,
        300
      ]
    },
    {
      "parameters": {},
      "name": "Does not Exist",
      "type": "n8n-nodes-base.noOp",
      "typeVersion": 1,
      "position": [
        920,
        200
      ]
    },
    {
      "parameters": {},
      "name": "Exists",
      "type": "n8n-nodes-base.noOp",
      "typeVersion": 1,
      "position": [
        920,
        400
      ]
    }
  ],
  "connections": {
    "Set": {
      "main": [
        [
          {
            "node": "IF",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "IF": {
      "main": [
        [
          {
            "node": "Does not Exist",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Exists",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}