# Cáclulo de raiz quadrada de s
s=5
r=0; r
is=1 # Sei que 2^2<5 e 2^3>5
n=10
d=1
for ( i in -is:n){
r=r+d*2^{-i}
print(r)
d=sign(s-r^2) # Verifica se r^2>s.
print(d)
}
print("r, raiz quadra aproximada de s=5");r
print("Erro em 5-r^2");s-r^2
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