Select one value:

radioButtons(inputId = "r1", 
               label = "Select one value:", 
               choices = c("A", "B", "C"))

Select one value:

selectInput(inputId = "s1", 
               label = "Select one value:", 
               choices = state.name, 
               selected = "Wisconsin")

Select one or more values:

selectInput(inputId = "s2", 
               label = "Select one or more values:", 
               choices = state.abb, 
               selected = "WI", 
               multiple = T)

Select one or more values:

checkboxGroupInput(inputId = "c1", 
               label = "Select one or more values:", 
               choices = c("A", "B", "C"))

Select one date:

dateInput(inputId = "d1", 
               label = "Select one date:")

Select a date range:

dateRangeInput(inputId = "d2", 
               label = "Select a date range:", 
               start = Sys.Date()-1, 
               end = Sys.Date()+1)

Select a number:

numericInput(inputId = "n1", 
               label = "Select a number:", 
               value = 5, 
               min = 0, 
               max = 10)

Select a number:

sliderInput(inputId = "s3", 
               label = "Select a number:", 
               min = 0, 
               max = 10, 
               value = 5)

Select a number range:

sliderInput(inputId = "s4", 
               label = "Select a number range:", 
               min = 0, 
               max = 10, 
               value = c(0, 5))

Type something:

textInput(inputId = "t1", 
               label = "Type something:", 
               value = "Name")

Toggle an option

checkboxInput(inputId = "c2", 
               label = "Toggle an option")

Examples of Shiny input functions