This is a karabiner configuration to print number when caps is ON, on macOS

karabiner_number.json

{
  "title": "number with caps",
  "rules": [
    {
      "description": "caps_lock + numbers actually do numbers",
      "manipulators": [
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "1",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "1",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "2",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "2",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "3",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "3",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "4",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "4",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "5",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "5",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "6",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "6",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "7",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "7",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "8",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "8",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "9",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "9",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },
        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 1
            }
          ],
          "from": {
            "key_code": "0",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "key_code": "0",
              "modifiers": ["shift"]
            }
          ],
          "type": "basic"
        },

        {
          "conditions": [
            {
              "name": "caps_lock pressed",
              "type": "variable_if",
              "value": 0
            }
          ],
          "from": {
            "key_code": "caps_lock",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "set_variable": {
                "name": "caps_lock pressed",
                "value": 1
              }
            }
          ],
          "to_if_alone": [
            {
              "key_code": "caps_lock"
            }
          ],
          "type": "basic"
        },
        {
          "type": "basic",
          "from": {
            "key_code": "caps_lock",
            "modifiers": {
              "optional": ["any"]
            }
          },
          "to": [
            {
              "set_variable": {
                "name": "caps_lock pressed",
                "value": 1
              }
            }
          ],
          "to_after_key_up": [
            {
              "set_variable": {
                "name": "caps_lock pressed",
                "value": 0
              }
            }
          ]
        }
      ]
    }
  ]
}