factorial.json

{
    "criteria": {
        "nothing": {
            "trigger": "minecraft:impossible"
        }
    },
    "rewards": {
        "commands": [
            "advancement revoke @s only command:maths/factorial",
            "scoreboard players add @s sc 0",
            "tellraw @s[score_sc_min=0,score_sc=0,score_ix1=-1] {\"text\":\"Your number is too small!\"}",
            "scoreboard players set @s[score_sc_min=0,score_sc=0,score_ix1=-1] sc 3",
            "tellraw @s[score_sc_min=0,score_sc=0,score_ix1_min=13] {\"text\":\"Your number is too big!\"}",
            "scoreboard players set @s[score_sc_min=0,score_sc=0,score_ix1_min=13] sc 3",
            "scoreboard players set @s[score_sc_min=0,score_sc=0] ox1 1",
            "scoreboard players set @s[score_sc_min=0,score_sc=0,score_ix1_min=0,score_ix1=0] sc 2",
            "execute @s[score_sc_min=0,score_sc=0] ~ ~ ~ scoreboard players operation @s ic = @s ix1",
            "scoreboard players set @s[score_sc_min=0,score_sc=0] sc 1",

            "execute @s[score_sc_min=1,score_sc=1] ~ ~ ~ scoreboard players operation @s ox1 *= @s ic",
            "scoreboard players remove @s[score_sc_min=1,score_sc=1] ic 1",
            "scoreboard players set @s[score_sc_min=1,score_sc=1,score_ic=0] sc 2",

            "advancement grant @s[score_sc=1] only command:maths/factorial",
            "tellraw @s[score_sc=2,score_sc_min=2] [\"\",{\"text\":\"Factorial of \"},{\"score\":{\"name\":\"@s\",\"objective\":\"ix1\"}},{\"text\":\" is \"},{\"score\":{\"name\":\"@s\",\"objective\":\"ox1\"}}]",
            "scoreboard players set @s[score_sc_min=2] sc 0"
        ]
    }
}