Q
What is the result of '20' - 10 in JavaScript?

Answer & Solution

Answer: Option A
Solution:
<div>Subtracting a number from a string in JavaScript converts the string to a number, so '20' - 10 results in 10.</div>
Related Questions on Average

What will be the value of x after executing the code: let x = 10; x -= 2; x *= 3;?

A). 24

B). 30

C). 36

D). 12

What will be the output of 20 / '5' in JavaScript?

A). 4

B). NaN

C). Infinity

D). Error

What is the purpose of the % operator in JavaScript?

A). Exponentiation

B). Division

C). Modulus

D). Concatenation

What will be the result of 3 * 'A' in JavaScript?

A). Error

B). NaN

C). 0

D). 3

What will be the result of 5 == '5' in JavaScript?

A). 1

B). 0

C). Error

D). Undefined

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 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 is the value of x after executing the code: let x = 10; x += 5; x /= 3;?

A). 5

B). 15

C). 33

D). 67

What will be the output of '5' + 2 - 1 in JavaScript?

A). '52'

B). 6

C). '4'

D). Error

What will be the output of '2' + 2 + 2 in JavaScript?

A). '222'

B). 6

C). 4

D). Error