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Break
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Break

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Break[]

exits the nearest enclosing Do, For, Until or While.

Details

  • Break[] takes effect as soon as it is evaluated, even if it appears inside other functions.
  • After a Break the value Null is returned from the enclosing control structure.
  • The function of Break can also be achieved using Throw and Catch.

Examples

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Basic Examples  (1)Summary of the most common use cases

Break out of the Do when i is larger than 2:

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In[1]:=1
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https://wolfram.com/xid/0bufra-kpv
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Scope  (1)Survey of the scope of standard use cases

Break out of a Do loop:

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In[1]:=1
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https://wolfram.com/xid/0bufra-dwbqpm
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Break out of a For loop:

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In[2]:=2
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https://wolfram.com/xid/0bufra-ij6zp
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Out[2]=2

Break out of a While loop:

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In[3]:=3
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https://wolfram.com/xid/0bufra-cx5mgf
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Out[3]=3

Applications  (1)Sample problems that can be solved with this function

Test the condition of a loop during or at the end of the loop:

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In[1]:=1
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https://wolfram.com/xid/0bufra-bltnjr
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Properties & Relations  (2)Properties of the function, and connections to other functions

Use Throw and Catch instead of Break:

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In[1]:=1
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https://wolfram.com/xid/0bufra-o9u9nl
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Out[1]=1

Continue skips the rest of a loop, but resumes with the next iteration:

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In[1]:=1
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https://wolfram.com/xid/0bufra-uio
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Wolfram Research (1988), Break, Wolfram Language function, https://reference.wolfram.com/language/ref/Break.html (updated 2022).
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Wolfram Research (1988), Break, Wolfram Language function, https://reference.wolfram.com/language/ref/Break.html (updated 2022).

Text

Wolfram Research (1988), Break, Wolfram Language function, https://reference.wolfram.com/language/ref/Break.html (updated 2022).

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Wolfram Research (1988), Break, Wolfram Language function, https://reference.wolfram.com/language/ref/Break.html (updated 2022).

CMS

Wolfram Language. 1988. "Break." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2022. https://reference.wolfram.com/language/ref/Break.html.

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Wolfram Language. 1988. "Break." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2022. https://reference.wolfram.com/language/ref/Break.html.

APA

Wolfram Language. (1988). Break. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Break.html

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Wolfram Language. (1988). Break. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Break.html

BibTeX

@misc{reference.wolfram_2025_break, author="Wolfram Research", title="{Break}", year="2022", howpublished="\url{https://reference.wolfram.com/language/ref/Break.html}", note=[Accessed: 26-March-2025 ]}

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@misc{reference.wolfram_2025_break, author="Wolfram Research", title="{Break}", year="2022", howpublished="\url{https://reference.wolfram.com/language/ref/Break.html}", note=[Accessed: 26-March-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_break, organization={Wolfram Research}, title={Break}, year={2022}, url={https://reference.wolfram.com/language/ref/Break.html}, note=[Accessed: 26-March-2025 ]}

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@online{reference.wolfram_2025_break, organization={Wolfram Research}, title={Break}, year={2022}, url={https://reference.wolfram.com/language/ref/Break.html}, note=[Accessed: 26-March-2025 ]}