IES: JS-deck 14

Question 1

JS Operator “ %= “

Answer 1

• Performs the arithmetical operation on the two operands first
• Then assigns the results of that operation to the first variable - so that becomes its new stored value.
• Example: a%=b
• Equivalent: a=(a%b)

Question 2

JS Operator “ **= “

Answer 2

• Performs the arithmetical operation on the two operands first
• Then assigns the results of that operation to the first variable - so that becomes its new stored value.
• Example: a**=b
• Equivalent: a=(a**b)

Question 3

JS Operator “ === “

Answer 3

• Equality operator
• Compares values
• Compares if 2 operands are exactly equal (identical number values, identical characters, identical positions, identical data types, etc)
• JS is case sensitive: be aware character capitalization must match for equality
• The converse, the inequality operator “!==” employs the same rules
• Useful in comparing two values to perform “conditional branching,” where the script will follow a particular direction according to the results.
• Ex.
  1. Be aware of differing data types
  2. 25 === ‘25’ returns false
  3. 25 == ‘25’ returns true

Question 4

JS Operator “ !== “

Answer 4

• Inequality operator
• Compares values
• Compares if 2 operands are not exactly equal (unidentical number values, unidentical characters, unidentical positions, unidentical data types, etc)
• JS is case sensitive: be aware character capitalization must match for equality
• Useful in comparing two values to perform “conditional branching,” where the script will follow a particular direction according to the results.
• The converse, the equality operator “===” employs the same rules
• Ex.
  1. Be aware of differing data types
  2. 25 !== ‘25’ returns true
  3. 25 != ‘25’ returns false

Question 5

JS Operator “ == “

Answer 5

• checks for equality between two values
• Compares after performing type coercion, if necessary. (if operands are different types, JS attempts conversion to a common type before comparing)
• Useful in comparing two values to perform “conditional branching,” where the script will follow a particular direction according to the results.
• Ex.
  1. 5 == “5” string
  2. “5” converts to the number 5
  3. Script comparison eval’s to true
• Ex.
  1. Be aware of differing data types
  2. 25 == ‘25’ returns true
  3. 25 === ‘25’ returns false

Question 6

JS Operator “ != “

Answer 6

• checks for inequality between two values
• Compares after performing type coercion, if necessary. (if operands are different types, JS attempts conversion to a common type before comparing)
• Useful in comparing two values to perform “conditional branching,” where the script will follow a particular direction according to the results.
• Ex.
  1. 5 != “5” string
  2. “5” converts to the number 5
  3. Script comparison eval’s to true
• Ex.
  1. Be aware of differing data types
  2. 25 != ‘25’ returns false
  3. 25 !== ‘25’ returns true

Question 7

JS Operator “ > “

Answer 7

• “greater than” operator
• Compares 2 operands
• Returns true if the first is greater in value than the second
• Used frequently to test the value of a counter variable in a loop structure
• Conversely, the “less than” operator makes the same comparison but returns true when the first is less in value than the second

Question 8

JS Operator “ < “

Answer 8

• “less than” operator
• Compares 2 operands
• Returns true if the first is less in value than the second
• Used frequently to test the value of a counter variable in a loop structure
• Conversely, the “greater than” operator makes the same comparison but returns true when the first is greater in value than the second

Question 9

JS Operator “ >= “

Answer 9

• “greater than or equal to” operator
• Compares 2 operands
• Returns true : if the first is greater in value than the second or if the first is equal in value to the second
• [May be used frequently to test the value of a counter variable in a loop structure?]
• The converse is the “less than or equal to” operator

Question 10

JS Operator “ <= “

Answer 10

• “less than or equal to” operator
• Compares 2 operands
• Returns true : if the first is less in value than the second or if the first is equal in value to the second
• [May be used frequently to test the value of a counter variable in a loop structure?]
• The converse is the “greater than or equal to” operator

Question 11

JS Operator “ “

Question 12

JS Operator “ “

Question 13

JS Operator “ “

Question 14

JS Operator “ “

Question 15

JS Operator “ “

Question 16

JS Operator “ “

Question 17

JS Operator “ “

Question 18

JS Operator “ “

Question 19

JS Operator “ “

Question 20

JS Operator “ “