Question

1. Write the Java expression for the following (a² + b²) + 2ab
Find the output of the following:
a) If int x=7 find the value of X+ = x++ +++X + --X + X c)Math.abs(Math.cell(-99 51))
d)Math.round(10.4)
e)System.out.println(1+1+"two");​

Answer 1

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Q. Write the java expression for the following :

$(a^{2} + b^{2} ) + 2ab$

int x;

x = (Math.pow(a, 2) + Math.pow(b, 2)) + 2 * a * b;

Q. Find the output of the following :

a) If int x=7 find the value of X += X++ + ++X + --X + X

==> 39 is the output.

c) Math.abs(Math.cell(-99.51))

==>  98 as 'abs' function returns the absolute value and ceil rounds it to nearest higher integer.

d) Math.round(10.4)

==> 10 as round function rounds the number to nearest integer.

e) System.out.println(1+1+"two");​

==> 2two as first the two integers add up and then concatenate to the string..

I hope that my answer helped you...