Cobol equation help!

3870x2 · Dec 3, 2012, 02:47 PM

I need help getting a mortgage calculation working on COBOL, the image has what I need exactly, and this is what I have currently:

Code:

               COMPUTE M ROUNDED = P * ( R / 12 ) -
               ( P * (( R / 12)/( 1 - ( 1 + R / 12 )**(12 * N))))

Where M = monthly payment, P = principal, R = rate (IE 0900 = 9%) and N = number of years.

I must be getting a small number, I get 0 for M unless I enter very large numbers (IE P=999,999,999, N=99 years, and R=99%)

Well, that was a rather large image. It was taken on my phone.

Drone · Dec 3, 2012, 08:46 PM

Honestly I have no idea about COBOL nor mortgage but that formula seems wrong. Place where blah ^12*N. It's gotta be blah ^-12*N. Maybe that's why you get wrong answer.

3870x2 · Dec 4, 2012, 01:17 PM

I have fixed it, my equation was correct, but the values that I entered were going in as 9000% instead of 9%. The answer I was getting was monthly payment = 0, so I thought that it was too low, it turns out that at 9000% the number was quite large, and the numbers were getting concatenated to be 0 when the number came out to be millions, but there was only room for 9999.99.

Drone · Dec 4, 2012, 02:43 PM

I see now. There are so many different mortgage formulas. Good to know you've fixed that.

Dec 3, 2012, 02:47 PM	#1
3870x2 Join Date: Feb 2008 Location: Joplin, Mo Posts: 4,543 (2.37/day) Thanks: 175 Thanked 691 Times in 557 Posts System Specs	Cobol equation help! I need help getting a mortgage calculation working on COBOL, the image has what I need exactly, and this is what I have currently: Code: COMPUTE M ROUNDED = P * ( R / 12 ) - ( P * (( R / 12)/( 1 - ( 1 + R / 12 )*(12 N)))) Where M = monthly payment, P = principal, R = rate (IE 0900 = 9%) and N = number of years. I must be getting a small number, I get 0 for M unless I enter very large numbers (IE P=999,999,999, N=99 years, and R=99%) Well, that was a rather large image. It was taken on my phone. __________________ A+, N+, S+, MCSE. Heatware STEAM ID Name: furi0nst0rmrage (0s are zeros) M O D E R N\|\|W A R F A R E \|\| 2 \|\| CLUBHOUSE // TEAM “The amount exaltation of the processor cores can brings amazing floating” -sparkle Last edited by 3870x2; Dec 3, 2012 at 04:45 PM.

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Dec 3, 2012, 08:46 PM	#2
Drone Join Date: Sep 2010 Location: Nonlocal location Posts: 1,897 (1.90/day) Thanks: 62 Thanked 822 Times in 525 Posts System Specs	Honestly I have no idea about COBOL nor mortgage but that formula seems wrong. Place where blah ^12N. It's gotta be blah ^-12N. Maybe that's why you get wrong answer. __________________ ...the young Universe was filled with a hot dense soup of interacting protons, electrons and photons at about 2700ºC. When the protons and electrons joined to form hydrogen atoms, the light was set free

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Dec 4, 2012, 01:17 PM	#3
3870x2 Join Date: Feb 2008 Location: Joplin, Mo Posts: 4,543 (2.37/day) Thanks: 175 Thanked 691 Times in 557 Posts System Specs	I have fixed it, my equation was correct, but the values that I entered were going in as 9000% instead of 9%. The answer I was getting was monthly payment = 0, so I thought that it was too low, it turns out that at 9000% the number was quite large, and the numbers were getting concatenated to be 0 when the number came out to be millions, but there was only room for 9999.99. __________________ A+, N+, S+, MCSE. Heatware STEAM ID Name: furi0nst0rmrage (0s are zeros) M O D E R N\|\|W A R F A R E \|\| 2 \|\| CLUBHOUSE // TEAM “The amount exaltation of the processor cores can brings amazing floating” -sparkle

Dec 4, 2012, 02:43 PM	#4
Drone Join Date: Sep 2010 Location: Nonlocal location Posts: 1,897 (1.90/day) Thanks: 62 Thanked 822 Times in 525 Posts System Specs	I see now. There are so many different mortgage formulas. Good to know you've fixed that. __________________ ...the young Universe was filled with a hot dense soup of interacting protons, electrons and photons at about 2700ºC. When the protons and electrons joined to form hydrogen atoms, the light was set free

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