If productCost and productPrice are numeric variables, and productName is a stri

Question

If productCost and productPrice are numeric variables, and productName is a string variable, which of the following statements are valid assignments? If a statement is not valid, explain why not.

productCost=100

productPrice=productCost

productPrice=productName

productPrice=”24.95”

15.67=productCost

productCost= $1,345.52

productCost = prodcutPrice – 10

prodcutName = “mouse pad”

productCost + 20 = productPrice

prodcutName = 3-inch nails

prodcutName = 43

prodcutName = “44”

“99” = prodcutName

prodcutName = brush

Explanation / Answer

productCost=100 //Valid statement. 100 will be assigned to productCost.

productPrice=productCost //Valid statement. The value in productCost will be copied to productPrice.

productPrice=productName //Invalid statement. productName is a variable of type string, and it cannot be assigned to an integer variable.

productPrice=”24.95” //Invalid statement. productPrice is a variable of type integer, and a string cannot be assigned.

15.67=productCost //Invalid statement. Left side value should be a variable.

productCost= $1,345.52 //Invalid statment. $ is not a numeric value and its not allowed to be assigned to numeric variable.

productCost = prodcutPrice – 10 //Valid statement. 10 will be subtracted from productPrice and the result will be assigned to productCost.

prodcutName = “mouse pad” //Valid statement. A string is being assigned to a string variable.

productCost + 20 = productPrice //Invalid statment. Left side of = should be a variable, and not an expression.

prodcutName = 3-inch nails //Invalid statement. String should be either in double quotes, which is string constant, or a variable also of type string. The left hand side value is neither.

prodcutName = 43 //Invalid statement. Same reason as stated for the previous statement.

prodcutName = “44” //Valid statement. A string constant "44" is assigned to the string variable productName

“99” = prodcutName //Invalid statement. Leftside of = should be a variable. Its a constant which is not allowed.

prodcutName = brush //Invalid statement, unless brush is declared a string variable.

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