20a function used to calculate length of a right triangle's hypotenuse given its other two sides

% length F calculates a length
% a function used to calculate length of a right triangle's hypotenuse given its other two sides
% c is outpt argument
% a & b are input arguments
c = sqrt (a.2  +   b.  2 ) % combination of arithmetic operations needed to calculate the hypotenuse length 

not enough input arguments
error in length F
C= sqrt ( a.2  + b.2) % combination of arithmetic operations needed to calculate the hypotenuse length

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[Walter Roberson]

What is your question?

[Denise Lessey]

calculate the hypotenuse length

[Walter Roberson]

What does Wikipedia say about the length of the hypotenuse?