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ICSE Class 10 Computer Applications Question 28 of 30

Solved 2025 Specimen Paper ICSE Class 10 Computer Applications — Question 28

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28
Question

Question 2(viii)

A student is trying to convert the string present in x to a numerical value, so that he can find the square root of the converted value. However the code has an error. Name the error (syntax / logical / runtime). Correct the code so that it compiles and runs correctly.

String x= "25";
int y=Double.parseDouble(x); 
double r=Math.sqrt(y); 
System.out.println(r);
Answer

Syntax error in the line:
int y=Double.parseDouble(x);

Corrected code:

String x= "25";
double y=Double.parseDouble(x); //int changed to double
double r=Math.sqrt(y); 
System.out.println(r);

Explanation:

The error is a syntax error because the method Double.parseDouble(x) returns a double, but the code is trying to assign it to an int variable without proper casting, which is not allowed in Java.