What is the difference between the x $=$ input$("$Enter a letter"$)$ and input$("$Enter a letter"$)?$

x $=$ input$("$Enter a letter"$)$ will store the input into the variable named x$,$ while input$("$Enter a letter"$)$ will collect the input and then throw it away.

x $=$ input$("$Enter a letter"$)$ will accept a number while input$("$Enter a letter"$)$ will accept a character.

x $=$ input$("$Enter a letter"$)$ will store a number if one is entered while input$("$Enter a letter"$)$ will only store characters.

There is no difference in the two statements; they both will accept whatever the user types in$.$