let is used for assigning constants whereas var is used for creating variables.
ie:
let salute: Character = “Hey there…”
let everyone: Character = “Swift World”
var saluteEveryone = salute + everyone
saluteEveryone = saluteEveryone + “!”
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Programming smart devices with the cloud for robotic intelligence solutions using Arduino, Raspberry Pi, Python, iOS, Android Internet Of Things Tank
let is used for assigning constants whereas var is used for creating variables.
ie:
let salute: Character = “Hey there…”
let everyone: Character = “Swift World”
var saluteEveryone = salute + everyone
saluteEveryone = saluteEveryone + “!”