Computer Applications

Write a difference between the functions isUpperCase( ) and toUpperCase( ).

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isUpperCase( )	toUpperCase( )
isUpperCase( ) function checks if a given character is in uppercase or not.	toUpperCase( ) function converts a given character to uppercase.
Its return type is boolean.	Its return type is char.

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String s1 = "45.50"; String s2 = "54.50";
double d1=Double.parseDouble(s1);
double d2=Double.parseDouble(s2);
int x= (int)(d1+d2);

What is value of x?