item 
An item can be used to specify any minecraft item or block.
An item is a type of ingredient and can therefore be used as one in any argument.
Note
The hand command can be used to easily get the resourceLocation of an item.
Argument
An item is specified using the “item” keyword.
item(resourceLocation)
Example
#creates an item of type diamond
item(minecraft:diamond)Modifiers
Count
Specifies the number of the the item, by default this is 1.
.count(amount)
.c(amount)
Meta
Specifies the metadata value assigned to the item.
.meta(value)
.m(value)
NBT
Specifies any NBT information assigned to the item.
.nbt(value)
.n(value)
Enchant
Helper that can assign an enchantment to the item.
.enchant(name:level)
.e(name:level)
Example
#adds the Protection 4 enchantment to a diamond sword
item(minecraft:diamond_sword).enchant(minecraft:protection:4)