CODEWITHSUNDEEP
pythonstring
user12681585
user12681585

Reputation:

Why does my string not display with the decimal points I want?

I am trying to make a program where if I input the degree, it converts it into radian and then calculate its Sine, Cosine and Tangent using Taylor's Theory. Note that I am not supposed to invoke the math module.

def sinAns(rad):
    rad=rad
    radPlaceHolder=rad
    counter=0
    numberForFacto=1
    tOld=rad
    tNew=0
    tPlaceHolder=rad
    pr=precision+1
    tDiff=1
    sinAns=0

    while abs(tDiff)>.5*10**(-pr):       
        tOld=tPlaceHolder
        tNew=(-1*tOld*rad*rad)/((numberForFacto+1)*(numberForFacto+2))
        tPlaceHolder=tNew       
        counter+=1
        numberForFacto+=2
        tDiff=abs(tOld)-abs(tNew)
        radPlaceHolder+=tNew
        sinAns=radPlaceHolder
    return sinAns

This is how my code for calculating Sine looks like.

print("{0:}{1:{2}f}".format("sin= ", sinAns(rad), precision))

This is the line where it prints the value later in the program, and I already have the precision defaulted at 10. But when I run the program, it displays 0.500000 instead of the precision I want it to be. Even if I change the precision to any other value between 2-10, it ALWAYS shows 0.500000.

Any idea how to fix this? Have been tweaking around for an hour and still haven't got a clue.

Upvotes: 2

Views: 84

Answers (1)

tenhjo
tenhjo

Reputation: 4537

You are missing the point .:

print("{0}{1:.{2}f}".format("sin= ", sinAns(rad), precision))
           # ^

Upvotes: 2

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