Answer & Solution
Answer: Option B
Solution:
<div>The code x += '2' is equivalent to x = x + '2', resulting in concatenation of the string '2' to the number 5, giving '72'.</div>
Q
What will be the value of x after executing the code: let x = 5; x += '2';?
Related Questions on Average
What will be the result of 5 == '5' in JavaScript?
A). 1
B). 0
C). Error
D). Undefined
What will be the output of '2' + 2 + 2 in JavaScript?
A). '222'
B). 6
C). 4
D). Error
What will be the output of 20 / '5' in JavaScript?
A). 4
B). NaN
C). Infinity
D). Error
What will be the output of '7' - 3 in JavaScript?
A). 4
B). '4'
C). NaN
D). Error
What will be the output of 10 + '2' - 1 in JavaScript?
A). '101'
B). '10'
C). NaN
D). Error
What does the operator
A).
B). do in JavaScript?
C). Logical AND
D). Logical OR
What does the unary operator + do to a string in JavaScript?
A). Concatenates it
B). Ignores it
C). Converts it to a number
D). Throws an error
What will be the result of '10' + 10 in JavaScript?
A). '1010'
B). 20
C). NaN
D). Error
What is the result of '20' - 10 in JavaScript?
A). 10
B). '10'
C). NaN
D). 20
What will be the output of '5' + 2 - 1 in JavaScript?
A). '52'
B). 6
C). '4'
D). Error