'''  Purpose: demonstrate arithmetic and use of variables
        for naming things
'''

# name some values
a =   4
b =  10
c =  -5
d =  100

print( a )
print( b )
print( c )
print( d )

input()

print( "a =", a )
print( "b =", b )
print( "c =", c )
print( "d =", d )

input()

w =  -3.14
x =   4.25
y =  10.75
z =   2.50

print( "w =", w )
print( "x =", x )
print( "y =", y )
print( "z =", z )

input()

# display some calculations with integers

print( 'Integer manipulation' )

print() 

print(  a, '+',  b, '=', a + b  )
print(  b, '-',  a, '=', b - a  )
print(  a, '*',  b, '=', a * b  )
print(  b, '/',  a, '=', b / a  )

input()

print(  b, '//', a, '=', b // a )

input()

print(  b, '**', d, '=', b ** d )

input()

print(  b, '%',  a, '=', b %  a )

input()

print( -b, '=', -b )

input()

print( 'abs(', c, ') =', abs( c ) )
print( 'int(', y, ') =', int( y ) )

print()

# display some calculations with floats

print( 'Float manipulation' )

print() 

print(  x, '+',  y, '=', x + y  )
print(  y, '-',  x, '=', y - x  )
print(  x, '*',  y, '=', x * y  )
print(  y, '/',  x, '=', y / x  )

input()

print(  y, '//', x, '=', y // x )
print(  y, '%',  x, '=', y %  x )
print(  x, '**', z, '=', x ** z )

input()

print( -y, '=', -y )

input()

print( 'abs(',   w, ') =', abs( w ) )
print( 'float(', x, ') =', float( x ) )

input() 

# display some calculations with mixed operands

print( 'Mixed numeric manipulation' )

print() 

print(  a, '+',  y, '=', a + y  )
print(  y, '-',  b, '=', y - b  )
print(  a, '*',  y, '=', a * y  )
print(  y, '/',  b, '=', y / b  )

input()

print(  y, '//', b, '=', y // b )
print(  y, '%',  b, '=', y %  b )
print(  a, '**', z, '=', a ** z )