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 value of x after executing the code: let x = 10; x /= 2;?
A). 5
B). 20
C). 0
D). 2
What does the operator
A).
B). do in JavaScript?
C). Logical AND
D). Logical OR
What will be the result of 5 == '5' in JavaScript?
A). 1
B). 0
C). Error
D). Undefined
What is the result of '20' - 10 in JavaScript?
A). 10
B). '10'
C). NaN
D). 20
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 will be the output of 10 + '2' - 1 in JavaScript?
A). '101'
B). '10'
C). NaN
D). Error
What does the typeof operator return for an array in JavaScript?
A). 'array'
B). 'object'
C). 'null'
D). 'undefined'
What does the operator === do in JavaScript?
A). Checks for equality without type conversion
B). Assigns a value
C). Performs a strict comparison
D). Concatenates strings
What will be the output of '2' + 2 + 2 in JavaScript?
A). '222'
B). 6
C). 4
D). Error