{"id":59,"date":"2019-08-30T19:23:02","date_gmt":"2019-08-30T19:23:02","guid":{"rendered":"https:\/\/tutorialio.com\/?p=59"},"modified":"2019-08-30T19:23:02","modified_gmt":"2019-08-30T19:23:02","slug":"exponential-and-logarithmic-functions-in-php","status":"publish","type":"post","link":"https:\/\/hellonitish.com\/blog\/exponential-and-logarithmic-functions-in-php\/","title":{"rendered":"Exponential and Logarithmic Functions in PHP"},"content":{"rendered":"\n\n\n\n\n\n\n\n\n\n
Random Number Functions Functions in PHP<\/caption>\n<\/caption>\n
Function Name<\/th>\nFunction Description<\/th>\n<\/tr>\n
exp()<\/a><\/td>\nCalculates the exponent of e<\/td>\n<\/tr>\n
expm1()<\/a><\/td>\nReturns exp(number) – 1, computed in a way that is accurate even when the value of number is close to zero<\/td>\n<\/tr>\n
log10()<\/a><\/td>\nBase-10 logarithm<\/td>\n<\/tr>\n
log1p()<\/a><\/td>\nReturns log(1 + number), computed in a way that is accurate even when the value of number is close to zero<\/td>\n<\/tr>\n
log()<\/a><\/td>\nNatural logarithm<\/td>\n<\/tr>\n
pow()<\/a><\/td>\nExponential expression<\/td>\n<\/tr>\n
sqrt()<\/a><\/td>\nSquare root<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

PHP exp()<\/code> Function<\/h2>\n

PHP exp()<\/code> Usage<\/h3>\n

The PHP exp()<\/code><\/code> function will give you e<\/code> raised to the power of arg<\/code>.<\/p>\n

PHP exp()<\/code> Syntax<\/h3>\n
 exp ( float $arg ) : float<\/code><\/pre>\n
PHP exp()<\/code> Parameters<\/h3>\n
    \n
  1. \n
    arg<\/code> \u2014 The argument to process <\/p>\n<\/li>\n<\/ol>\n
    PHP exp()<\/code> Return Value<\/h3>\n
    The PHP exp()<\/code> function returns ‘e’ raised to the power of arg<\/code><\/p>\n
    PHP exp()<\/code> Working Examples<\/h3>\n
    1. exp() example<\/h4>\n
    <?php\necho exp(12) . \"\\n\";\necho exp(5.7);\n?><\/code><\/pre>\n
    Output of the above code:<\/p>\n
    1.6275E+005\n298.87<\/code><\/pre>\n
    Important Points about PHP exp()<\/code> Function<\/h3>\n
      \n
    1. \n
       ‘e<\/code>‘ is the base of the natural system of logarithms, or approximately 2.718282. <\/p>\n<\/li>\n<\/ol>\n
      PHP expm1()<\/code> Function<\/h2>\n
      PHP expm1()<\/code> Usage<\/h3>\n
      The PHP expm1()<\/code><\/code> function will give you exp(number) – 1, computed in a way that is accurate even when the value of number is close to zero .<\/p>\n
      PHP expm1()<\/code> Syntax<\/h3>\n
       expm1 ( float $arg ) : float<\/code><\/pre>\n
      PHP expm1()<\/code> Parameters<\/h3>\n
        \n
      1. \n
        arg<\/code> \u2014 The argument to process <\/p>\n<\/li>\n<\/ol>\n
        PHP expm1()<\/code> Return Value<\/h3>\n
        The PHP expm1()<\/code> function returns ‘e’ to the power of arg<\/code> minus one<\/p>\n
        Changelog for PHP expm1()<\/code> Function<\/h3>\n
        5.3.0 \u2014 <\/strong> This function is now available on all platforms <\/p>\n
        PHP log10()<\/code> Function<\/h2>\n
        PHP log10()<\/code> Usage<\/h3>\n
        The PHP log10()<\/code><\/code> function will give you the base-10 logarithm of arg<\/code>.<\/p>\n
        PHP log10()<\/code> Syntax<\/h3>\n
         log10 ( float $arg ) : float<\/code><\/pre>\n
        PHP log10()<\/code> Parameters<\/h3>\n
          \n
        1. \n
          arg<\/code> \u2014 The argument to process <\/p>\n<\/li>\n<\/ol>\n
          PHP log10()<\/code> Return Value<\/h3>\n
          The PHP log10()<\/code> function returns the base-10 logarithm of arg<\/code><\/p>\n
          PHP log1p()<\/code> Function<\/h2>\n
          PHP log1p()<\/code> Usage<\/h3>\n
          The PHP log1p()<\/code><\/code> function will give you log(1 + number), computed in a way that is accurate even when the value of number is close to zero .<\/p>\n
          PHP log1p()<\/code> Syntax<\/h3>\n
           log1p ( float $number ) : float<\/code><\/pre>\n
          PHP log1p()<\/code> Parameters<\/h3>\n
            \n
          1. \n
            number<\/code> \u2014 The argument to process <\/p>\n<\/li>\n<\/ol>\n
            PHP log1p()<\/code> Return Value<\/h3>\n
            The PHP log1p()<\/code> function returns log(1 + number<\/code>)<\/p>\n
            Changelog for PHP log1p()<\/code> Function<\/h3>\n
            5.3.0 \u2014 <\/strong> This function is now available on all platforms <\/p>\n
            PHP log()<\/code> Function<\/h2>\n
            PHP log()<\/code> Usage<\/h3>\n
            The PHP log()<\/code><\/code> function will give you logbase arg<\/code>, otherwise log()<\/code> return the natural logarithm of arg<\/code>.<\/p>\n
            PHP log()<\/code> Syntax<\/h3>\n
             log ( float $arg [, float $base = M_E ] ) : float<\/code><\/pre>\n
            PHP log()<\/code> Parameters<\/h3>\n
              \n
            1. \n
              arg<\/code> \u2014 The value to calculate the logarithm for <\/p>\n<\/li>\n
            2. \n
              base<\/code> \u2014 The optional logarithmic base to use (defaults to ‘e’ and so to the natural logarithm). <\/p>\n<\/li>\n<\/ol>\n
              PHP log()<\/code> Return Value<\/h3>\n
              The PHP log()<\/code> function returns the logarithm of arg<\/code> to base<\/code>, if given, or the natural logarithm.<\/p>\n
              PHP pow()<\/code> Function<\/h2>\n
              PHP pow()<\/code> Usage<\/h3>\n
              The PHP pow()<\/code><\/code> function will give you base<\/code> raised to the power of exp<\/code>.<\/p>\n
              PHP pow()<\/code> Syntax<\/h3>\n
               pow ( number $base , number $exp ) : number<\/code><\/pre>\n
              PHP pow()<\/code> Parameters<\/h3>\n
                \n
              1. \n
                base<\/code> \u2014 The base to use <\/p>\n<\/li>\n
              2. \n
                exp<\/code> \u2014 The exponent <\/p>\n<\/li>\n<\/ol>\n
                PHP pow()<\/code> Return Value<\/h3>\n
                The PHP pow()<\/code> function returns d with integer type, otherwise it will be returned as a float.<\/p>\n
                PHP pow()<\/code> Working Examples<\/h3>\n
                1. Some examples of pow()<\/h4>\n
                <?php\nvar_dump(pow(2, 8)); \/\/ int(256)\necho pow(-1, 20); \/\/ 1\necho pow(0, 0); \/\/ 1\necho pow(10, -1); \/\/ 0.1\necho pow(-1, 5.5); \/\/ PHP >=5.2.2: NAN\necho pow(-1, 5.5); \/\/ PHP <5.2.2: -NAN\n?><\/code><\/pre>\n
                Important Points about PHP pow()<\/code> Function<\/h3>\n
                  \n
                1. \n
                   In PHP 5.6 onwards, you may prefer to use the ** operator. <\/p>\n<\/li>\n
                2. \n
                   This function will convert all input to a number, even non-scalar values, which could lead to weird<\/strong> results. <\/p>\n<\/li>\n<\/ol>\n
                  Additional Tips from Fellow Developers<\/h3>\n
                  Contributed By: chris<\/p>\n
                  Many notations use \"^\" as a power operator, but in PHP (and other C-based languages) that is actually the XOR operator. You need to use this 'pow' function, there is no power operator.\ni.e. 3^2 means \"3 XOR 2\" not \"3 squared\".\nIt is particular confusing as when doing Pythagoras theorem in a 'closet points' algorithm using \"^\" you get results that look vaguely correct but with an error.<\/pre>\n
                  <\/code><\/p>\n
                  Contributed By: gilthans<\/p>\n
                  Note that pow(0, 0) equals to 1 although mathematically this is undefined.<\/pre>\n
                  <\/code><\/p>\n
                  PHP sqrt()<\/code> Function<\/h2>\n
                  PHP sqrt()<\/code> Usage<\/h3>\n
                  The PHP sqrt()<\/code><\/code> function will give you the square root of arg<\/code>.<\/p>\n
                  PHP sqrt()<\/code> Syntax<\/h3>\n
                   sqrt ( float $arg ) : float<\/code><\/pre>\n
                  PHP sqrt()<\/code> Parameters<\/h3>\n
                    \n
                  1. \n
                    arg<\/code> \u2014 The argument to process <\/p>\n<\/li>\n<\/ol>\n
                    PHP sqrt()<\/code> Return Value<\/h3>\n
                    The PHP sqrt()<\/code> function returns the square root of arg<\/code> or the special value NAN<\/strong> for negative numbers.<\/p>\n
                    PHP sqrt()<\/code> Working Examples<\/h3>\n
                    1. sqrt() example<\/h4>\n
                    <?php\n\/\/ Precision depends on your precision directive\necho sqrt(9); \/\/ 3\necho sqrt(10); \/\/ 3.16227766 ...\n?><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
                    Random Number Functions Functions in PHP Function Name Function Description exp() Calculates the exponent of e expm1() Returns exp(number) – 1, computed in a way that is accurate even when the value of number is close to zero log10() Base-10 logarithm log1p() Returns log(1 + number), computed in a way that is accurate even when […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[8,5],"class_list":["post-59","post","type-post","status-publish","format-standard","hentry","category-reference","tag-math","tag-php"],"_links":{"self":[{"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/posts\/59","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/comments?post=59"}],"version-history":[{"count":0,"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/posts\/59\/revisions"}],"wp:attachment":[{"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/media?parent=59"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/categories?post=59"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hellonitish.com\/blog\/wp-json\/wp\/v2\/tags?post=59"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}